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    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis, showing fibrosis and lack of a functional liver anatomy. — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis, showing fibrosis and lack of a functional liver anatomy.
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Parotid salivary gland — Stock Photo
    Parotid salivary gland
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen — Stock Photo
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Secondary liver cancer — Stock Photo
    Secondary liver cancer
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Colored scanning electron micrograph of scales from silverfish insect living fossil. — Stock Photo
    Colored scanning electron micrograph of scales from silverfish insect living fossil.
    Pit formed on metal or semiconductor surface — Stock Photo
    Pit formed on metal or semiconductor surface
    Simple columnar epithelium, digital illustration. — Stock Photo
    Simple columnar epithelium, digital illustration.
    Human stomach adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach adenocarcinoma, computer illustration and light micrograph.
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species — Stock Photo
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species
    Coloured scanning electron micrograph of bacteria cultured from used dishcloth. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from used dishcloth.
    Helicobacter pylori bacterium — Stock Photo
    Helicobacter pylori bacterium
    Puffball fungus spore — Stock Photo
    Puffball fungus spore
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum. — Stock Photo
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum.
    Hidradenoma papilliferum, light micrograph (LM) of section of affected vulva. Hidradenoma papilliferumis type of benign cystic papillary growth (lower part of image) that occurs on labia majora of vulva — Stock Photo
    Hidradenoma papilliferum, light micrograph (LM) of section of affected vulva. Hidradenoma papilliferumis type of benign cystic papillary growth (lower part of image) that occurs on labia majora of vulva
    Giant Polytene chromosomes — Stock Photo
    Giant Polytene chromosomes
    Ductal carcinoma of the breast — Stock Photo
    Ductal carcinoma of the breast
    Simple columnar epithelium, digital illustration. — Stock Photo
    Simple columnar epithelium, digital illustration.
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium — Stock Photo
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium
    Light micrograph of a section through follicle from a thyroid gland affected by Grave's disease. — Stock Photo
    Light micrograph of a section through follicle from a thyroid gland affected by Grave's disease.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Collagen bundles from the delicate connective tissue — Stock Photo
    Collagen bundles from the delicate connective tissue
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species — Stock Photo
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Retina. Light micrograph of a section through the retina showing its 10 layers. — Stock Photo
    Retina. Light micrograph of a section through the retina showing its 10 layers.
    Human hair, coloured scanning electron micrograph (SEM). Magnification: x550 when printed at 10 centimetres wide. — Stock Photo
    Human hair, coloured scanning electron micrograph (SEM). Magnification: x550 when printed at 10 centimetres wide.
    Shell of a radiolarian — Stock Photo
    Shell of a radiolarian
    Hepatic bile duct infected with cocidian protozoa — Stock Photo
    Hepatic bile duct infected with cocidian protozoa
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Colored scanning electron micrograph of cancer cells from human colon. — Stock Photo
    Colored scanning electron micrograph of cancer cells from human colon.
    Leaf epidermis, light micrograph. The leaf epidermis under light microscope view has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. The leaf epidermis under light microscope view has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte. — Stock Photo
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte.
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Light microscope objective lenses in laboratory. — Stock Photo
    Light microscope objective lenses in laboratory.
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Plant vascular tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Plant vascular tissue, light micrograph. Haematoxylin and eosin stain.
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue).
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin — Stock Photo
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin
    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant. — Stock Photo
    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant.
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    Immature parasitic trematode — Stock Photo
    Immature parasitic trematode
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph.
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). — Stock Photo
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM).
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. — Stock Photo
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba.
    Cross-section of spinal cord, light micrograph. — Stock Photo
    Cross-section of spinal cord, light micrograph.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Human tooth fractured enamel, coloured scanning electron micrograph (SEM). — Stock Photo
    Human tooth fractured enamel, coloured scanning electron micrograph (SEM).
    Human eyelash mites — Stock Photo
    Human eyelash mites
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph. — Stock Photo
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph.
    Colored scanning electron micrograph of microstructures formed on nickel surface. — Stock Photo
    Colored scanning electron micrograph of microstructures formed on nickel surface.
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( blue) is an insulating fatty layer that surrounds the myelinated nerve fibres (pink) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( blue) is an insulating fatty layer that surrounds the myelinated nerve fibres (pink)
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Sciatic nerve showing a bundle of nerve fibres — Stock Photo
    Sciatic nerve showing a bundle of nerve fibres
    Micrograph of H3N2 influenza virus particles. — Stock Photo
    Micrograph of H3N2 influenza virus particles.