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Human Heart. Illustration of the human heart showing the coronary arteries Stock PhotoHuman Heart. Illustration of the human heart showing the coronary arteriesVentricles of the brain. Image showing human brain within the skull, with detail of the ventricles and meninges Royalty Free Stock ImagesVentricles of the brain. Image showing human brain within the skull, with detail of the ventricles and meningesOld and Young Skin. Comparison between old skin and young skin Royalty Free Stock PhotoOld and Young Skin. Comparison between old skin and young skinBones of the Foot. The bones of the foot as seen from above, unlabeled Stock PhotosBones of the Foot. The bones of the foot as seen from above, unlabeledBones of the foot, labeled. Bones of the foot as seen from above (superior aspect), with the bones labeled Royalty Free Stock PhotoBones of the foot, labeled. Bones of the foot as seen from above (superior aspect), with the bones labeledFoot circulation. Blood supply to foot, showing bones and major blood vessels Royalty Free Stock PhotographyFoot circulation. Blood supply to foot, showing bones and major blood vesselsCirculation of the foot - labelled. Blood supply to foot, showing bones and major blood vessels, labelled Stock PhotographyCirculation of the foot - labelled. Blood supply to foot, showing bones and major blood vessels, labelledSkin burns labeled. Cross section through normal and burnt skin Royalty Free Stock PhotosSkin burns labeled. Cross section through normal and burnt skinCapillary bed labeled. Capillary bed showing lymph drainage Royalty Free Stock PhotoCapillary bed labeled. Capillary bed showing lymph drainage3D Skin. #D cross section of skin showing the major layers and structures Stock Photography3D Skin. #D cross section of skin showing the major layers and structuresEye 1. Cross section of eye showing all major structures Royalty Free Stock PhotographyEye 1. Cross section of eye showing all major structuresFemale urogenitory. Cross section of female reproductive organs and bladder Stock ImageFemale urogenitory. Cross section of female reproductive organs and bladderHair follicle. Detail of hair shaft, follicle and bulb with labels Stock PhotosHair follicle. Detail of hair shaft, follicle and bulb with labelsHand bones. Drawing of the bones of the hand, with labels Stock ImagesHand bones. Drawing of the bones of the hand, with labelsLacrimal apparatus. Drawing of the lacrimal gland and tear duct Royalty Free Stock PhotoLacrimal apparatus. Drawing of the lacrimal gland and tear ductLimb bones. Bones of upper and lower human limbs Royalty Free Stock PhotosLimb bones. Bones of upper and lower human limbsMale abdominal. Cross section of male abdomen, showing genitalia and bladder Royalty Free Stock ImagesMale abdominal. Cross section of male abdomen, showing genitalia and bladderHuman muscles posterior. Posterior (back) view of human male musculature Stock PhotoHuman muscles posterior. Posterior (back) view of human male musculatureHuman muscles anterior. Anterior (front) view of human male musculature Stock PhotosHuman muscles anterior. Anterior (front) view of human male musculatureFinger nail. Top view and cross section of a finger nail Royalty Free Stock ImageFinger nail. Top view and cross section of a finger nailHuman skeleton Ventral view. Human adult skeleton ventral (anterior or front) view Stock PhotosHuman skeleton Ventral view. Human adult skeleton ventral (anterior or front) viewSkin cross section. Cross section of skin showing all layers and major appendages Royalty Free Stock PhotoSkin cross section. Cross section of skin showing all layers and major appendagesVestibular apparatus of the ear. The semicircular canals, vestibule and cochlea inside the human ear Royalty Free Stock PhotographyVestibular apparatus of the ear. The semicircular canals, vestibule and cochlea inside the human earVeins of the antecubital fossa. The veins found in the antecubital fossa (the inner elbow Royalty Free Stock ImageVeins of the antecubital fossa. The veins found in the antecubital fossa (the inner elbowLung alveoli normal and asthma. Structure of terminal bronchioles and alveoli in the normal state and during asthmatic constriction Stock PhotosLung alveoli normal and asthma. Structure of terminal bronchioles and alveoli in the normal state and during asthmatic constrictionAnatomy of respiratory tract. Drawing of the trachea, bronchi and lungs showing bronchioles and alveoli Stock ImagesAnatomy of respiratory tract. Drawing of the trachea, bronchi and lungs showing bronchioles and alveoliPlaque formation in artery. The development of an atheromatous plaque in the wall of an artery Royalty Free Stock PhotosPlaque formation in artery. The development of an atheromatous plaque in the wall of an arteryPlaque formation in artery. The development of an atheromatous plaque in the wall of an artery Stock PhotoPlaque formation in artery. The development of an atheromatous plaque in the wall of an arteryAntibody action. The action of an antibody in the presence of an antigen Royalty Free Stock ImageAntibody action. The action of an antibody in the presence of an antigenAntibody action. The action of an antibody in the presence of an antigen Stock PhotoAntibody action. The action of an antibody in the presence of an antigenAntibody action and anaphylaxis. The action of an antibody in the presence of an antigen causing anaphylaxis Stock PhotographyAntibody action and anaphylaxis. The action of an antibody in the presence of an antigen causing anaphylaxisAnatomy of an antibody. Diagram showing the major components of a typical antibody molecule (IgE Stock PhotosAnatomy of an antibody. Diagram showing the major components of a typical antibody molecule (IgEHand showing arthritic changes. Drawing of a hand showing the typical changes associated with arthritis Stock ImagesHand showing arthritic changes. Drawing of a hand showing the typical changes associated with arthritisDiagram of atmospheric pressure vs altitude. Graph to show the difference in atmospheric pressure at different altitudes Royalty Free Stock PhotoDiagram of atmospheric pressure vs altitude. Graph to show the difference in atmospheric pressure at different altitudesIllustration of basic neuron types. Drawing of the four major types of nerve cell Royalty Free Stock PhotographyIllustration of basic neuron types. Drawing of the four major types of nerve cellBladder anatomy and relation to uterus. Drawing of the urinary bladder both in cross section and in relation to the uterus Stock ImageBladder anatomy and relation to uterus. Drawing of the urinary bladder both in cross section and in relation to the uterusBlood distribution due to gravity. Illustration of how blood in the body is affected by normal gravity versus zero gravity Stock PhotographyBlood distribution due to gravity. Illustration of how blood in the body is affected by normal gravity versus zero gravityMale and female breast anatomy. Drawing of the anatomy of the male and female breast Stock ImagesMale and female breast anatomy. Drawing of the anatomy of the male and female breastCoronary arteries and plaque formation. Anterior and posterior views of the heart showing the coronary arteries, plus a crioss section of an artery showing Stock ImageCoronary arteries and plaque formation. Anterior and posterior views of the heart showing the coronary arteries, plus a crioss section of an artery showingAnatomy of cardiac muscle. The anatomy of heart (cardiac) muscle, showing the gross arrangement and microscopic detail Stock PhotographyAnatomy of cardiac muscle. The anatomy of heart (cardiac) muscle, showing the gross arrangement and microscopic detailCarotid and aortic bodies. Drawing of the heart showing the carotid and aortic bodies Stock ImagesCarotid and aortic bodies. Drawing of the heart showing the carotid and aortic bodiesRenal blood flow. Diagram of blood flow through the kidney showing detail of kidney tubule (nephron Stock ImagesRenal blood flow. Diagram of blood flow through the kidney showing detail of kidney tubule (nephronNeurotransmitters involved in Epilepsy. Diagram of a nerve cell and the connections of other nerves to it, showing detail of neurotransmitter and receptor action Stock PhotoNeurotransmitters involved in Epilepsy. Diagram of a nerve cell and the connections of other nerves to it, showing detail of neurotransmitter and receptor actionAnatomy of the nose. Front and side views of the nose showing major structural features Royalty Free Stock PhotosAnatomy of the nose. Front and side views of the nose showing major structural featuresInserting a laryngoscope. Illustration showing the insertion of both a curved bladed and a straight bladed laryngoscope Stock PhotosInserting a laryngoscope. Illustration showing the insertion of both a curved bladed and a straight bladed laryngoscopeFacial fractures. Drawing of facial fractures showing the Le Fort classification Royalty Free Stock ImageFacial fractures. Drawing of facial fractures showing the Le Fort classificationPedal Pulses. Drawing of the arteries of the foot showing sites of the pedal pulses Stock ImagePedal Pulses. Drawing of the arteries of the foot showing sites of the pedal pulsesGastrointestinal tracts and liver. Drawing of the normal gastrointestinal tract and also showing the position of the liver Royalty Free Stock ImageGastrointestinal tracts and liver. Drawing of the normal gastrointestinal tract and also showing the position of the liverLarge and small intestines. Showing the nature of the faeces found at various points in the colon Stock ImageLarge and small intestines. Showing the nature of the faeces found at various points in the colonDiagram of a catheter. Foley type catheter showing inflated and deflated balloon Royalty Free Stock PhotosDiagram of a catheter. Foley type catheter showing inflated and deflated balloonAnatomy of the placenta. Cross section through the placenta showing umbilical cord, placental wall and uterus Stock PhotoAnatomy of the placenta. Cross section through the placenta showing umbilical cord, placental wall and uterusThe Circle of Willis. Drawing of the base of the human brain showing the arterial plexus called the Circle of Willis Stock ImageThe Circle of Willis. Drawing of the base of the human brain showing the arterial plexus called the Circle of WillisColostomy sites. Drawing of common sites for colostomy and ileostomy Royalty Free Stock PhotoColostomy sites. Drawing of common sites for colostomy and ileostomyDiagram of constipated bowel. Cross section of the abdomen showing normal and constipated bowel Royalty Free Stock PhotographyDiagram of constipated bowel. Cross section of the abdomen showing normal and constipated bowelDiagram of Complement Pathway. Diagram showing the action of complement on the antibody/antigen complex Royalty Free Stock ImagesDiagram of Complement Pathway. Diagram showing the action of complement on the antibody/antigen complexHiatus hernia. Drawing of the stomach and diaphragm showing a hiatus hernia Royalty Free Stock ImagesHiatus hernia. Drawing of the stomach and diaphragm showing a hiatus herniaCrossmatch. Blood typing by crossmatch showing reactions between different blood groups Royalty Free Stock ImageCrossmatch. Blood typing by crossmatch showing reactions between different blood groupsCytoskeleton. Diagram of cell organelles which form and become bound by the cytoskeleton Royalty Free Stock ImagesCytoskeleton. Diagram of cell organelles which form and become bound by the cytoskeletonDemyelinisation. The effects of demyelinisation on nerve impulses Royalty Free Stock ImageDemyelinisation. The effects of demyelinisation on nerve impulsesAnatomy of the gut. 3D exploded image of colon showing major anatomical features Stock PhotosAnatomy of the gut. 3D exploded image of colon showing major anatomical featuresAction of eczema on skin. Diagramatic cross section of skin showing the effects of eczema Royalty Free Stock ImagesAction of eczema on skin. Diagramatic cross section of skin showing the effects of eczemaNormal and malfunctioning vein valves. Diagram to show the action of normal vein valves and in the diseased malfunctioning state Stock PhotoNormal and malfunctioning vein valves. Diagram to show the action of normal vein valves and in the diseased malfunctioning stateECG limb leads. Position of ECG (EKG) limb leads Stock PhotographyECG limb leads. Position of ECG (EKG) limb leadsECG chest leads. Position of standard and right-sided ECG (EKG) chest leads Royalty Free Stock ImageECG chest leads. Position of standard and right-sided ECG (EKG) chest leadsDeep vein thrombosis. Drawing of normal veins in the lower leg and the formation of deep vein thrombosis Royalty Free Stock PhotoDeep vein thrombosis. Drawing of normal veins in the lower leg and the formation of deep vein thrombosisEpithelial types. The structure and formation of different types of epithelial tissue Royalty Free Stock ImagesEpithelial types. The structure and formation of different types of epithelial tissuePaediatric faces pain chart. Chart used for the establishment of degree of pain in children Stock PhotoPaediatric faces pain chart. Chart used for the establishment of degree of pain in childrenFemale genitourinary. Cross section through the female abdomen showing the genitourinary structures Stock PhotographyFemale genitourinary. Cross section through the female abdomen showing the genitourinary structuresFetal Development Chart. A graph to show the relationship between weight and crown-heel length in developing fetus Stock ImagesFetal Development Chart. A graph to show the relationship between weight and crown-heel length in developing fetusHead louse. Drawing of mature head louse and hair with eggs Royalty Free Stock ImageHead louse. Drawing of mature head louse and hair with eggsAnatomy of blood vessels. From artery through capillaries and vein Royalty Free Stock PhotosAnatomy of blood vessels. From artery through capillaries and veinProgress of blood through heart. Cross section through the heart showing the progress of blood from deoxygenated (right side) to oxygenated (left side Royalty Free Stock ImagesProgress of blood through heart. Cross section through the heart showing the progress of blood from deoxygenated (right side) to oxygenated (left sidePosterior veins of the leg. Dorsal view of the leg showing major veins Royalty Free Stock ImagePosterior veins of the leg. Dorsal view of the leg showing major veinsAnterior veins of the leg. Anterior view of the leg showing the major veins Royalty Free Stock PhotographyAnterior veins of the leg. Anterior view of the leg showing the major veinsDiffusion through plasma membrane. Simple diffusion of water and gasses through a cell's plasma membrane Stock ImagesDiffusion through plasma membrane. Simple diffusion of water and gasses through a cell's plasma membraneCongenital heart defect. Comparison of normal heart and the congenital heart defect Tetralogy of Fallot Royalty Free Stock PhotographyCongenital heart defect. Comparison of normal heart and the congenital heart defect Tetralogy of FallotHeart sounds. The mechanism of the production of the typical lub dub heart sounds Stock PhotographyHeart sounds. The mechanism of the production of the typical lub dub heart soundsPosition of the prostate gland. The prostate gland and its relationship to the bladder, rectum and pubic bone Royalty Free Stock PhotoPosition of the prostate gland. The prostate gland and its relationship to the bladder, rectum and pubic boneLymph node. Cross section of a lymph node showing blood supply, follicles and lymphatic vessels Stock ImageLymph node. Cross section of a lymph node showing blood supply, follicles and lymphatic vesselsThe lymph system. Overview of the lymphatic system showing nodes, vessels and the thoracic duct Stock ImagesThe lymph system. Overview of the lymphatic system showing nodes, vessels and the thoracic ductMast cells and allergy. The action of allergen and the formation of IgE and degranulation of mast cells Royalty Free Stock PhotoMast cells and allergy. The action of allergen and the formation of IgE and degranulation of mast cellsThe Meninges. The brain and skull to show the position and order of the membranes around the brain Royalty Free Stock ImageThe Meninges. The brain and skull to show the position and order of the membranes around the brainBladder catheters in-situ. The position of a urinary (Folley) catheter in male and female Stock ImageBladder catheters in-situ. The position of a urinary (Folley) catheter in male and femaleSystemic and pulmonary circulations. Diagram of the heart showing the systemic (body) circulation and the pulmonary (lungs) circulation Royalty Free Stock PhotosSystemic and pulmonary circulations. Diagram of the heart showing the systemic (body) circulation and the pulmonary (lungs) circulationThe human gut. The human alimentary canal from mouth to anus showing detail of intestinal mucosal cells Royalty Free Stock ImagesThe human gut. The human alimentary canal from mouth to anus showing detail of intestinal mucosal cellsSpinal deformities. Deformities of the spine, scoliosis and kyphosis (hunchback Stock PhotoSpinal deformities. Deformities of the spine, scoliosis and kyphosis (hunchbackHeart auscultation. Areas of the heart used for auscultation (listening for heart sounds Stock ImageHeart auscultation. Areas of the heart used for auscultation (listening for heart soundsHepatitis B vaccine. The production of Hepatitis B vaccine using aq surface antigen gene inserted into yeast cells Stock ImagesHepatitis B vaccine. The production of Hepatitis B vaccine using aq surface antigen gene inserted into yeast cellsFormation of pouch following colostomy. Following removal of the colon, rectum and anus, a pouch is formed from remaining small intestine Royalty Free Stock PhotographyFormation of pouch following colostomy. Following removal of the colon, rectum and anus, a pouch is formed from remaining small intestineMast cell degranulation. Explosive degranulation of vasoactive amines and other proinflammatory mediators after exposure of mast cell to food antigen Royalty Free Stock ImagesMast cell degranulation. Explosive degranulation of vasoactive amines and other proinflammatory mediators after exposure of mast cell to food antigenVertebra. Cross section of a vertebra showing spinal cord and dure, arachnoid and pia mater Stock PhotoVertebra. Cross section of a vertebra showing spinal cord and dure, arachnoid and pia materThe lymphatic system. Overview of the lymphatic system, including ducts, nodes cisterna chyli and thoracic duct Royalty Free Stock PhotographyThe lymphatic system. Overview of the lymphatic system, including ducts, nodes cisterna chyli and thoracic ductHuman chromosomes. The 23 pairs of human chromosomes arranged in order and showing XY chromosomes (male Royalty Free Stock ImageHuman chromosomes. The 23 pairs of human chromosomes arranged in order and showing XY chromosomes (maleChromosome and DNA. Diagram of a generic chromosome with detail of DNA and areas representing two different genes Royalty Free Stock PhotosChromosome and DNA. Diagram of a generic chromosome with detail of DNA and areas representing two different genesSkin. Cross section of skin showing the various layers and structural elements and a variety of nerve endings Stock PhotosSkin. Cross section of skin showing the various layers and structural elements and a variety of nerve endingsSkin. Cross section of skin showing the various layers and structural elements Royalty Free Stock PhotoSkin. Cross section of skin showing the various layers and structural elementsLund diagram. Of percentage skin area in children (for estimating burn area Royalty Free Stock ImagesLund diagram. Of percentage skin area in children (for estimating burn areaVeins of the foot. Drawing of the supercial veins on the plantar surface of the foot Stock ImageVeins of the foot. Drawing of the supercial veins on the plantar surface of the footPregnant woman. Illustration of pregnant woman showing the foetus, uterus and vagina Stock PhotographyPregnant woman. Illustration of pregnant woman showing the foetus, uterus and vaginaRule of Nines. Diagram of the Rule of Nines, giving the percentage area of skin coverage in the adult Royalty Free Stock PhotoRule of Nines. Diagram of the Rule of Nines, giving the percentage area of skin coverage in the adultPelvis. Anterior view of the pelvic bones and the sacrum Royalty Free Stock ImagePelvis. Anterior view of the pelvic bones and the sacrumCross section of nose and throat. Showing major structures including the tongue and epiglottis Royalty Free Stock PhotographyCross section of nose and throat. Showing major structures including the tongue and epiglottisAntibiotics. Sites and modes of action of various antibiotics Royalty Free Stock PhotosAntibiotics. Sites and modes of action of various antibioticsNormal Ovary. Semi diagramatic representation of a normal ovary and the stages of ovulation Stock ImageNormal Ovary. Semi diagramatic representation of a normal ovary and the stages of ovulationMuscle contraction. The subcellular components involved in muscle contration -- actin and myosin Stock PhotographyMuscle contraction. The subcellular components involved in muscle contration -- actin and myosinGram positive and negative bacteria. Illustration to show the differences in the structure of the cell walls in Gram-positive and Gram-negative bacteria Stock ImagesGram positive and negative bacteria. Illustration to show the differences in the structure of the cell walls in Gram-positive and Gram-negative bacteriaTracheostomy tube placement. Cross section of the larynx (voicebox) showing the position of an inserted tracheostomy tube Royalty Free Stock PhotosTracheostomy tube placement. Cross section of the larynx (voicebox) showing the position of an inserted tracheostomy tubeVasectomy operation. Diagram of the scrotum and testes showing the portion of vas deferens removed in a vasectomy operation Stock PhotographyVasectomy operation. Diagram of the scrotum and testes showing the portion of vas deferens removed in a vasectomy operationFigure of eight leg bandage. Method for wrapping a leg in a figure of eight bandage Royalty Free Stock ImageFigure of eight leg bandage. Method for wrapping a leg in a figure of eight bandageAnatomy of the finger. The major anatomical features of the finger Royalty Free Stock ImagesAnatomy of the finger. The major anatomical features of the fingerGolgi apparatus. Detail of cell structure showing the Golgi apparatus Stock PhotographyGolgi apparatus. Detail of cell structure showing the Golgi apparatusECG trace. Diagram of a typical ECG (EKG) QRS wave Stock PhotosECG trace. Diagram of a typical ECG (EKG) QRS waveControl of blood oxygen. Diagram to show how the body controls a drop in blood oxygen through increased red blood cell production Royalty Free Stock PhotoControl of blood oxygen. Diagram to show how the body controls a drop in blood oxygen through increased red blood cell productionUrostomy. Illustration of a urostomy operation where a section of small bowel leads urine through the abdominal wall Royalty Free Stock ImageUrostomy. Illustration of a urostomy operation where a section of small bowel leads urine through the abdominal wallBlood supply to colon. The major arteries supplying the colon Royalty Free Stock ImagesBlood supply to colon. The major arteries supplying the colonIn vitro fertilization. Diagram to show the stages of in vitro fetilization, from ovary to blastocyst Stock ImageIn vitro fertilization. Diagram to show the stages of in vitro fetilization, from ovary to blastocystPolycystic ovary. Drawing (cross section) of a polycystic ovary showing multiple cysts Royalty Free Stock PhotoPolycystic ovary. Drawing (cross section) of a polycystic ovary showing multiple cystsLeg veins. Superficial and deep veins of the leg from the external iliac to the dorsal venous arch Royalty Free Stock PhotosLeg veins. Superficial and deep veins of the leg from the external iliac to the dorsal venous archVein valves. Sections through a vein showing the valve in both the open and closed positions Royalty Free Stock ImagesVein valves. Sections through a vein showing the valve in both the open and closed positionsMetastasis. Drawing of the spread of tumor cells from primary prostatic cancer to various bone sites Stock ImageMetastasis. Drawing of the spread of tumor cells from primary prostatic cancer to various bone sitesMalaria. Drawing of the mode of action of malaria infection from infected mosquito Stock PhotographyMalaria. Drawing of the mode of action of malaria infection from infected mosquitoEye oblique. Oblique view of a section through a human eye showing all major structures Stock PhotosEye oblique. Oblique view of a section through a human eye showing all major structuresMolar tooth. Image of a tooth in the socket and a cross section to show blood and nerve supply Royalty Free Stock PhotographyMolar tooth. Image of a tooth in the socket and a cross section to show blood and nerve supplyCornea and sclera of the eye. Diagram to show the difference between the transparent cornea and the opaqu sclera of the eye Royalty Free Stock PhotoCornea and sclera of the eye. Diagram to show the difference between the transparent cornea and the opaqu sclera of the eyeConjunctiva of the eye. Diagram to show the conjuntiva of the eye, including the eyelids and lashes Royalty Free Stock PhotographyConjunctiva of the eye. Diagram to show the conjuntiva of the eye, including the eyelids and lashesIris of the eye. Diagram to show the iris of the eye, contracted and dilated due to action of circular and radial muscles Stock PhotoIris of the eye. Diagram to show the iris of the eye, contracted and dilated due to action of circular and radial musclesFemale genitourinary system. Drawing of the female abdominal cavity showing the major structures of the genitourinary system Royalty Free Stock ImagesFemale genitourinary system. Drawing of the female abdominal cavity showing the major structures of the genitourinary systemHuman centre of gravity. Drawing to show the centre of gravity of a male adult human figure Stock PhotoHuman centre of gravity. Drawing to show the centre of gravity of a male adult human figureThe spinal column. Drawing of the spinal column to show the major curvatures Stock ImageThe spinal column. Drawing of the spinal column to show the major curvaturesSkin 3D cut away. 3-dimentional image of the skin, with the epidermal layers cut away Stock ImageSkin 3D cut away. 3-dimentional image of the skin, with the epidermal layers cut awaySkin 3D. 3-dimentional image of the skin, showing all major layers and appendages Royalty Free Stock PhotoSkin 3D. 3-dimentional image of the skin, showing all major layers and appendagesInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parent Royalty Free Stock ImagesInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parentInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parent Stock PhotographyInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parentInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parent Stock PhotosInheritance. Diagram of dominant inheritance, showing the likelihood of diseased offspring from a normal parent and a heterozygote parentGeneric Virus. Drawing of a generic virus showing both external and internal structures Royalty Free Stock ImagesGeneric Virus. Drawing of a generic virus showing both external and internal structuresGeneric bacterium. Drawing of a generic bacterium showing basic structures Stock PhotoGeneric bacterium. Drawing of a generic bacterium showing basic structuresFungi and protozoa. Drawing of generic fungi and protozoa Stock ImageFungi and protozoa. Drawing of generic fungi and protozoaWest Nile Virus. Drawing of the life cycle and infection path of West Nile Virus Stock ImageWest Nile Virus. Drawing of the life cycle and infection path of West Nile VirusPancreas. Drawing of the pancreas showing its position relative to the liver and duodenum Stock ImagePancreas. Drawing of the pancreas showing its position relative to the liver and duodenumAxillary lymph nodes. Drawing of the axilla of a woman showing the axillary lymph nodes and lymph plexus around the breast Stock PhotosAxillary lymph nodes. Drawing of the axilla of a woman showing the axillary lymph nodes and lymph plexus around the breastLymph drainage. Drawing of the route by which lymph returns to the blood circulation Stock PhotoLymph drainage. Drawing of the route by which lymph returns to the blood circulationCapillary bed lymphoedema. Drawing of normal capillary bed with lymph vessel and oedema caused by disruption of lymphatic vessel Royalty Free Stock PhotoCapillary bed lymphoedema. Drawing of normal capillary bed with lymph vessel and oedema caused by disruption of lymphatic vesselMitochondria. Oblique cross section of a single mitochondrion, showing detail of the membranes and mitochondrial DNA Royalty Free Stock ImagesMitochondria. Oblique cross section of a single mitochondrion, showing detail of the membranes and mitochondrial DNAMitrofanoff. Drawing to show the main principles behind the Mitrofanoff bladder procedure Royalty Free Stock PhotographyMitrofanoff. Drawing to show the main principles behind the Mitrofanoff bladder procedureHyperopic and myopic eyes. Drawing to show the difference between a normal eye and eyes with hyperopic and myopic shapes Stock ImageHyperopic and myopic eyes. Drawing to show the difference between a normal eye and eyes with hyperopic and myopic shapesHeart electrical conduction. Drawing of the heart, showing the SA and AV nodes, the pacemaker electrical conducting system Royalty Free Stock PhotosHeart electrical conduction. Drawing of the heart, showing the SA and AV nodes, the pacemaker electrical conducting systemAnatomy of the penis. Drawing of the main anatomical features of the penis Royalty Free Stock ImagesAnatomy of the penis. Drawing of the main anatomical features of the penisPeristalsis. Cross section of the mouth to show a bolus of food, with detail of the peristaltic wave moving food to the stomach Stock PhotoPeristalsis. Cross section of the mouth to show a bolus of food, with detail of the peristaltic wave moving food to the stomachMicrovilli. Detail of small intestinal villim, showing the villi and the crypts, blood supply and lymph vessels Royalty Free Stock ImageMicrovilli. Detail of small intestinal villim, showing the villi and the crypts, blood supply and lymph vesselsRibs and diaphragm. Drawing of the ribs to show the intercostal muscles and the position of the diaphragm Stock PhotographyRibs and diaphragm. Drawing of the ribs to show the intercostal muscles and the position of the diaphragmRespiratory control centers. Drawing of the brain and brainstem, shwoing areas of the pons that control respiration Stock PhotosRespiratory control centers. Drawing of the brain and brainstem, shwoing areas of the pons that control respirationFallopian tube ligation. Illustration of the uterus, Fallopian tubes and ovaries, showing Fallopian tube being tied Stock ImagesFallopian tube ligation. Illustration of the uterus, Fallopian tubes and ovaries, showing Fallopian tube being tiedTonicity. Red blood cells in isotonic, hypotonic and hypertonic solutions, showing how the cells swell, shrink or remain in balance Royalty Free Stock ImageTonicity. Red blood cells in isotonic, hypotonic and hypertonic solutions, showing how the cells swell, shrink or remain in balanceKidneys and bladder. Illustration of the human urinary tract, showing both kidneys, ureters and urinary bladder in cross section Royalty Free Stock PhotosKidneys and bladder. Illustration of the human urinary tract, showing both kidneys, ureters and urinary bladder in cross sectionMajor veins of the leg. Illustration of the major veins of the leg from the front (anterior) and back (posterior Royalty Free Stock PhotographyMajor veins of the leg. Illustration of the major veins of the leg from the front (anterior) and back (posteriorArtery atheroma plaque. Lipid plaque in the wall of an artery, atheroma, leading to hardening of the arterial wall and reduced blood flow Royalty Free Stock PhotosArtery atheroma plaque. Lipid plaque in the wall of an artery, atheroma, leading to hardening of the arterial wall and reduced blood flowBreast Cancer. Illustration of the human female breast in cross section and detail of ductal carcinoma Stock ImagesBreast Cancer. Illustration of the human female breast in cross section and detail of ductal carcinomaLymph nodes of the chest and axilla. Drawing of the lymph nodes of the chest and axilla, showing the relations to the underlying muscle and ribs Stock PhotographyLymph nodes of the chest and axilla. Drawing of the lymph nodes of the chest and axilla, showing the relations to the underlying muscle and ribsNervous control of muscle. Diagrammatic representation of the nerve pathway from muscle, through the spinal cord to the brain Stock ImagesNervous control of muscle. Diagrammatic representation of the nerve pathway from muscle, through the spinal cord to the brainHeart failure. Diagrammatic representation of the factors leading to heart failure Royalty Free Stock PhotoHeart failure. Diagrammatic representation of the factors leading to heart failureMuscle groups and types. Diagrammatic representation of skeletal muscle types and positions Stock ImageMuscle groups and types. Diagrammatic representation of skeletal muscle types and positionsAbdominal organs. Drawing of the stomach, intestines, liver and pancreas, and their relations and body position Royalty Free Stock PhotographyAbdominal organs. Drawing of the stomach, intestines, liver and pancreas, and their relations and body positionCross section of human kidney. Showing detail of blood supply, cortex, medulla, pyramids and calyx Royalty Free Stock ImagesCross section of human kidney. Showing detail of blood supply, cortex, medulla, pyramids and calyxNormal birth. Showing detail of fetal movement during delivery through the birth canal Stock PhotoNormal birth. Showing detail of fetal movement during delivery through the birth canalNerve control of muscle. Control of muscle showing nerve paths from the brain through the spinal cord and peripheral nerves Stock PhotographyNerve control of muscle. Control of muscle showing nerve paths from the brain through the spinal cord and peripheral nervesInsertion of suppository. Drawing to show the location and technique of suppository insertion for the delivery of drugs per rectum Stock PhotosInsertion of suppository. Drawing to show the location and technique of suppository insertion for the delivery of drugs per rectumDigestive tract. Drawing of the digestive tracts with detail of the liver and pancreas Royalty Free Stock ImageDigestive tract. Drawing of the digestive tracts with detail of the liver and pancreasCross section of a typical tooth. Drawing to show the main anatomical structures of a typical incisor tooth, including the bone of the jaw and gum Stock PhotoCross section of a typical tooth. Drawing to show the main anatomical structures of a typical incisor tooth, including the bone of the jaw and gumCross section of a tooth with a crown frac. Drawing to show the main anatomical structures of a typical incisor tooth, including the bone of the jaw and gum Royalty Free Stock PhotographyCross section of a tooth with a crown frac. Drawing to show the main anatomical structures of a typical incisor tooth, including the bone of the jaw and gumThe larynx and trachea. Drawing of the larynx and trachea, showing the relations between the trachea, aorta and oesophagus Royalty Free Stock PhotosThe larynx and trachea. Drawing of the larynx and trachea, showing the relations between the trachea, aorta and oesophagusAbdominal organs. Drawing of the abdomen showing abdominal organs of the female, including the digestive tracts and uterus Royalty Free Stock ImagesAbdominal organs. Drawing of the abdomen showing abdominal organs of the female, including the digestive tracts and uterusLe Fort skull fractures. Drawing of horizontal, pyramidal and transverse Le Fort fractures of the skull Royalty Free Stock PhotosLe Fort skull fractures. Drawing of horizontal, pyramidal and transverse Le Fort fractures of the skullCross section through skull. Drawing of the skull showing the internal surface, with the posterior, middle and anterior fossae labeled Stock PhotographyCross section through skull. Drawing of the skull showing the internal surface, with the posterior, middle and anterior fossae labeledRectal cancer and stoma. Drawing of stoma following the removal of the rectum, showing the large and small intestines, and area of removed rectal tissue Stock ImagesRectal cancer and stoma. Drawing of stoma following the removal of the rectum, showing the large and small intestines, and area of removed rectal tissueBowel cancer and stoma. Drawing of stoma following the removal of the sigmoid colon and rectum, showing the large and small intestines, and area of removed bowel Stock PhotoBowel cancer and stoma. Drawing of stoma following the removal of the sigmoid colon and rectum, showing the large and small intestines, and area of removed bowelRectal cancer and stoma. Drawing of stoma following the removal of the rectum, showing the large and small intestines, and area of removed rectal tissue Royalty Free Stock PhotographyRectal cancer and stoma. Drawing of stoma following the removal of the rectum, showing the large and small intestines, and area of removed rectal tissueBrain damage in Alzheimer's. Drawing of the brain, showing the hippocampus and areas of brain involvement in Alzheimer's disease Stock PhotosBrain damage in Alzheimer's. Drawing of the brain, showing the hippocampus and areas of brain involvement in Alzheimer's diseaseCatheter placed in male bladder. Drawing of a catheter in a male, showing the position of the catheter in the urethra and bladder, with an inflated balloon Stock PhotographyCatheter placed in male bladder. Drawing of a catheter in a male, showing the position of the catheter in the urethra and bladder, with an inflated balloonCross section of the brain showing nuclei. Drawing of the brain showing the basal ganglia and thalamic nuclei Stock ImagesCross section of the brain showing nuclei. Drawing of the brain showing the basal ganglia and thalamic nucleiExercises for hiatus hernia. Drawing to show three types of abdominal exercise for hiatus hernia Royalty Free Stock PhotographyExercises for hiatus hernia. Drawing to show three types of abdominal exercise for hiatus herniaHeart attack due to blocked artery. Drawing of the heart showing coronary arteries blocked by atheroma, plaque and thromosis Stock PhotosHeart attack due to blocked artery. Drawing of the heart showing coronary arteries blocked by atheroma, plaque and thromosisCatheter and urine bag. Drawing of a catheter in a male bladder connected to a urine collection bag Royalty Free Stock PhotoCatheter and urine bag. Drawing of a catheter in a male bladder connected to a urine collection bagMedical,Illustration,medical illustration,medical. Drawing to show the position of a stoma after an end colostomy following the removal of the sigmoid colon Stock PhotoMedical,Illustration,medical illustration,medical. Drawing to show the position of a stoma after an end colostomy following the removal of the sigmoid colonRemoval of the large bowel and ileostomy. Drawing of an ileostomy (ileum taken out to abdominal wall and a stoma formed) following removal of the large intestine Stock PhotographyRemoval of the large bowel and ileostomy. Drawing of an ileostomy (ileum taken out to abdominal wall and a stoma formed) following removal of the large intestineUrostomy following bladder surgery or obstruction. Drawing of a typical urostomy, where a small piece of ileum is used to redirect urine to the abdominal wall Royalty Free Stock PhotographyUrostomy following bladder surgery or obstruction. Drawing of a typical urostomy, where a small piece of ileum is used to redirect urine to the abdominal wallBowel removed and rectal pouch. Drawing of an ileo-rectal pouch made from ileum following bowel removal Royalty Free Stock PhotoBowel removed and rectal pouch. Drawing of an ileo-rectal pouch made from ileum following bowel removalDrawing of rectal pouch after bowel removal. Drawing to show the formation of a false rectal pouch from a section of small intestine, following removal of the Royalty Free Stock PhotographyDrawing of rectal pouch after bowel removal. Drawing to show the formation of a false rectal pouch from a section of small intestine, following removal of theKidney stone formation. Drawing to show the formation of a kidney stone, with detail of crystal formation in nephron and stone stuck in ureter Stock ImagesKidney stone formation. Drawing to show the formation of a kidney stone, with detail of crystal formation in nephron and stone stuck in ureterKidney stone formation. Drawing to show the formation of a kidney stone, with detail of crystal formation in nephron and stone stuck in ureter Royalty Free Stock PhotoKidney stone formation. Drawing to show the formation of a kidney stone, with detail of crystal formation in nephron and stone stuck in ureterCaecum and appendix. Drawing of the small and large intestine with detail of caecum and appendix Stock PhotoCaecum and appendix. Drawing of the small and large intestine with detail of caecum and appendixCaecum and appendix. Drawing of the small and large intestine with detail of caecum and appendix Stock PhotographyCaecum and appendix. Drawing of the small and large intestine with detail of caecum and appendixSacral nerves. Side view of the bowel, spinal column and sacral nerves, to show the nerves involved in bowel control Stock PhotographySacral nerves. Side view of the bowel, spinal column and sacral nerves, to show the nerves involved in bowel controlSacral nerves. Side view of the bowel, spinal column and sacral nerves, to show the nerves involved in bowel control Royalty Free Stock PhotoSacral nerves. Side view of the bowel, spinal column and sacral nerves, to show the nerves involved in bowel controlHand washing. Drawing to show the correct methods of hand washing to remove all trace of bacteria Royalty Free Stock PhotosHand washing. Drawing to show the correct methods of hand washing to remove all trace of bacteriaBiofilm formation on catheter. Drawing of a catheter in a female bladder, showing the formation of a biofilm on the catheter wall and urethral wall Royalty Free Stock ImageBiofilm formation on catheter. Drawing of a catheter in a female bladder, showing the formation of a biofilm on the catheter wall and urethral wallBiofilm formation on catheter. Drawing of a catheter in a female bladder, showing the formation of a biofilm on the catheter wall and urethral wall Stock PhotosBiofilm formation on catheter. Drawing of a catheter in a female bladder, showing the formation of a biofilm on the catheter wall and urethral wallContinuous ambulatory peritoneal dialysis. Drawing to show the technique of peritoneal dialysis, where dialysis fluid is placed in and then removed from the Stock ImagesContinuous ambulatory peritoneal dialysis. Drawing to show the technique of peritoneal dialysis, where dialysis fluid is placed in and then removed from theNormal and compromised breathing. Drawing to show normal breathing (inhalation and exhalation), and the effects of lung trauma Stock PhotographyNormal and compromised breathing. Drawing to show normal breathing (inhalation and exhalation), and the effects of lung traumaFormation of a blister. Drawing of blister formation in skin disease such as Epidermolysis bullosa, where the epidermis separates from the basement membrane and Royalty Free Stock PhotographyFormation of a blister. Drawing of blister formation in skin disease such as Epidermolysis bullosa, where the epidermis separates from the basement membrane andNerve pathways to the bladder. Drawing to show the nervous control of the urinary bladder viw the hypogastric, pelvic and pudendal nerves Royalty Free Stock PhotoNerve pathways to the bladder. Drawing to show the nervous control of the urinary bladder viw the hypogastric, pelvic and pudendal nerves