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    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    Coloured scanning electron micrograph of surface of prostate cancer cells. — Stock Photo
    Coloured scanning electron micrograph of surface of prostate cancer cells.
    Knee of obese patient with arthritis — Stock Photo
    Knee of obese patient with arthritis
    Waterlily pollen (Nymphaea mexicana), coloured scanning electron micrograph (SEM). — Stock Photo
    Waterlily pollen (Nymphaea mexicana), coloured scanning electron micrograph (SEM).
    Coloured 3D computed tomography (CT) scan of the healthy lungs of a 30 year old patient. — Stock Photo
    Coloured 3D computed tomography (CT) scan of the healthy lungs of a 30 year old patient.
    Knee of obese patient with arthritis — Stock Photo
    Knee of obese patient with arthritis
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph. — Stock Photo
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph.
    White blood cell — Stock Photo
    White blood cell
    Brain with aneurysm in the middle cerebral artery — Stock Photo
    Brain with aneurysm in the middle cerebral artery
    Bird bone tissue — Stock Photo
    Bird bone tissue
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    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
    Coloured X-ray showing cancer in the left lung of a 55-year-old patient. — Stock Photo
    Coloured X-ray showing cancer in the left lung of a 55-year-old patient.
    Coloured scanning electron micrograph of cultured cancer cell from human cervix showing numerous microvilli. — Stock Photo
    Coloured scanning electron micrograph of cultured cancer cell from human cervix showing numerous microvilli.
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample. — Stock Photo
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample.
    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 (blue) 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 (blue) are seen in the heads. Zebrafish eggs are transparent
    Human silhouette with Pneumocystis pneumonia and close-up of fungus spores. — Stock Photo
    Human silhouette with Pneumocystis pneumonia and close-up of fungus spores.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Wasp eye numerous lenses — Stock Photo
    Wasp eye numerous lenses
    Scorpion fly foot — Stock Photo
    Scorpion fly foot
    Normal leg veins, coloured angiogram - blood vessel X-ray — Stock Photo
    Normal leg veins, coloured angiogram - blood vessel X-ray
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Coloured scanning electron micrograph of Phasmarhabditis hermaphrodita microscopic nematode parasite of Rhabditidae. — Stock Photo
    Coloured scanning electron micrograph of Phasmarhabditis hermaphrodita microscopic nematode parasite of Rhabditidae.
    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM). — Stock Photo
    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM).
    Vaginal bacteria. Coloured scanning electron micrograph (SEM) of bacteria on the vaginal wall. A healthy vaginal flora protects the body against urogenital infections — Stock Photo
    Vaginal bacteria. Coloured scanning electron micrograph (SEM) of bacteria on the vaginal wall. A healthy vaginal flora protects the body against urogenital infections
    Prosthetic knee joint — Stock Photo
    Prosthetic knee joint
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Degenerative foot deformation — Stock Photo
    Degenerative foot deformation
    Digital illustration of Lyme disease tick parasite. — Stock Photo
    Digital illustration of Lyme disease tick parasite.
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food — Stock Photo
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food
    Fibrosarcoma cells in late stage of mitosis — Stock Photo
    Fibrosarcoma cells in late stage of mitosis
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    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
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Prostate cancer cells, coloured scanning electron micrograph. — Stock Photo
    Prostate cancer cells, coloured scanning electron micrograph.
    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.
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is brown. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (blue) contain enzymes for digesting foreign particles
    Components of house dust — Stock Photo
    Components of house dust
    Abutilon pollen grain — Stock Photo
    Abutilon pollen grain
    Colored scanning electron micrograph of breast cancer cell. — Stock Photo
    Colored scanning electron micrograph of breast cancer cell.
    Colored scanning electron micrograph of bundles of sensory cilia cells in macula utriculi within labyrinth of human inner ear. — Stock Photo
    Colored scanning electron micrograph of bundles of sensory cilia cells in macula utriculi within labyrinth of human inner ear.
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph. — Stock Photo
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph.
    Colored scanning electron micrograph of osteoblast osteocyte bone cell. — Stock Photo
    Colored scanning electron micrograph of osteoblast osteocyte bone cell.
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Red blood cells — Stock Photo
    Red blood cells
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood — Stock Photo
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood
    Blood clot structure — Stock Photo
    Blood clot structure
    Pair of child's jelly shoes, coloured X-ray. — Stock Photo
    Pair of child's jelly shoes, coloured X-ray.
    Blastocyst hollow ball of cells with fluid, digital illustration. — Stock Photo
    Blastocyst hollow ball of cells with fluid, digital illustration.
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Coloured scanning electron micrograph of bacteria cultured from mobile phone. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone.
    Cat flea head — Stock Photo
    Cat flea head
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres. — Stock Photo
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres.
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus. — Stock Photo
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus.
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture