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    Freshwater diatom Licmorpha sp. — Stock Photo
    Freshwater diatom Licmorpha sp.
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Colored scanning electron micrograph of rod-shaped, gram-negative bacteria Escherichia coli of human intestine. — Stock Photo
    Colored scanning electron micrograph of rod-shaped, gram-negative bacteria Escherichia coli of human intestine.
    Bacteria Erysipelothrix rhusiopathiae — Stock Photo
    Bacteria Erysipelothrix rhusiopathiae
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli — Stock Photo
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    Electron micrograph of Bacteria and yeast — Stock Photo
    Electron micrograph of Bacteria and yeast
    Structure of islet of langerhans, light micrograph. — Stock Photo
    Structure of islet of langerhans, light micrograph.
    Light micrograph of a cross section of xylem. The xylem is a type of tissue in vascular plants that transports water and some nutrients. — Stock Photo
    Light micrograph of a cross section of xylem. The xylem is a type of tissue in vascular plants that transports water and some nutrients.
    Intestinal brush border in small intestine showing numerous microvilli, colored transmission electron micrograph. — Stock Photo
    Intestinal brush border in small intestine showing numerous microvilli, colored transmission electron micrograph.
    Micrograph of H3N2 influenza virus particles. — Stock Photo
    Micrograph of H3N2 influenza virus particles.
    Mouse mammary tumour virus (MMTV) particles (blue), coloured transmission electron micrograph (TEM). MMTV induces malignant tumours in the mammary glands of certain strains of laboratory mice — Stock Photo
    Mouse mammary tumour virus (MMTV) particles (blue), coloured transmission electron micrograph (TEM). MMTV induces malignant tumours in the mammary glands of certain strains of laboratory mice
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum. — Stock Photo
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum.
    Bluebottle fly foot — Stock Photo
    Bluebottle fly foot
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Giardia lamblia, a protozoan (cyst stage) found in water contaminated by animal faeces, coloured scanning electron micrograph (SEM). — Stock Photo
    Giardia lamblia, a protozoan (cyst stage) found in water contaminated by animal faeces, coloured scanning electron micrograph (SEM).
    False-colour scanning electron micrograph of a section of healthy lung tissue, showing the microscopic air sacs (alveoli) where gas exchange takes place. — Stock Photo
    False-colour scanning electron micrograph of a section of healthy lung tissue, showing the microscopic air sacs (alveoli) where gas exchange takes place.
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus — Stock Photo
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus
    Coloured scanning electron micrograph of bacteria on surface of human tongue. — Stock Photo
    Coloured scanning electron micrograph of bacteria on surface of human tongue.
    Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear. — Stock Photo
    Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear.
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Section through a full term placenta — Stock Photo
    Section through a full term placenta
    Coloured scanning electron micrograph (SEM) of sensory inner hair cells from the organ of corti, in the cochlea of the inner ear. — Stock Photo
    Coloured scanning electron micrograph (SEM) of sensory inner hair cells from the organ of corti, in the cochlea of the inner ear.
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Lime tree stem — Stock Photo
    Lime tree stem
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Embryo selection for IVF — Stock Photo
    Embryo selection for IVF
    Coloured scanning electron micrograph (SEM) of Asbestos fiberschrysotile type. — Stock Photo
    Coloured scanning electron micrograph (SEM) of Asbestos fiberschrysotile type.
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph. — Stock Photo
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph.
    Simple columnar epithelium, light micrograph — Stock Photo
    Simple columnar epithelium, light micrograph
    Colored scanning electron micrograph of osteoblast osteocyte bone cell. — Stock Photo
    Colored scanning electron micrograph of osteoblast osteocyte bone cell.
    Prostate cancer cells, coloured scanning electron micrograph. — Stock Photo
    Prostate cancer cells, coloured scanning electron micrograph.
    Colored scanning electron micrograph of white blood cells and single platelet. — Stock Photo
    Colored scanning electron micrograph of white blood cells and single platelet.
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Lung tissue, coloured transmission electron micrograph (TEM). A pulmonary capillary containing two red blood cells (red) and three platelets (blue). A basement membrane (pink) surround the endothelium separating it from the alveolar epithelium — Stock Photo
    Lung tissue, coloured transmission electron micrograph (TEM). A pulmonary capillary containing two red blood cells (red) and three platelets (blue). A basement membrane (pink) surround the endothelium separating it from the alveolar epithelium
    Hoverfly head anatomy — Stock Photo
    Hoverfly head anatomy
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph.
    Cat flea head — Stock Photo
    Cat flea head
    Sapphire, SEM — Stock Photo
    Sapphire, SEM
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Dental plaque scanning electron micrograph — Stock Photo
    Dental plaque scanning electron micrograph
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (red) are seen in the heads. Zebrafish eggs are transparent — Stock Photo
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (red) are seen in the heads. Zebrafish eggs are transparent
    Tendon showing the parallel collagen fibres — Stock Photo
    Tendon showing the parallel collagen fibres
    Radiolarians amoeboid protozoa — Stock Photo
    Radiolarians amoeboid protozoa
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Colored scanning electron micrograph of microstructures formed on nickel surface. — Stock Photo
    Colored scanning electron micrograph of microstructures formed on nickel surface.
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide — Stock Photo
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia. — Stock Photo
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia.
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Nerve bundle from the sciatic nerve — Stock Photo
    Nerve bundle from the sciatic nerve
    Coloured scanning electron micrograph (SEM) of uric acid crystals. — Stock Photo
    Coloured scanning electron micrograph (SEM) of uric acid crystals.
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse. — Stock Photo
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse.
    Illustration of Lactobacillus colony — Stock Photo
    Illustration of Lactobacillus colony