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    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Asparagus beetle head — Stock Photo
    Asparagus beetle head
    Candida albicans infected medical catheter — Stock Photo
    Candida albicans infected medical catheter
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Electron micrograph of dental plaque — Stock Photo
    Electron micrograph of dental plaque
    Coloured scanning electron micrograph of breast cancer cell. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cell.
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators — Stock Photo
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Fly head anatomy — Stock Photo
    Fly head anatomy
    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.
    Female Asian tiger mosquito, colored scanning electron micrograph. — Stock Photo
    Female Asian tiger mosquito, colored scanning electron micrograph.
    Colored scanning electron micrograph of mains cable damaged by mouse teeth. — Stock Photo
    Colored scanning electron micrograph of mains cable damaged by mouse teeth.
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Cat flea head — Stock Photo
    Cat flea head
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface — Stock Photo
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Stagnant water bacteria — Stock Photo
    Stagnant water bacteria
    Plaque-forming bacteria — Stock Photo
    Plaque-forming bacteria
    Puffball fungus spores — Stock Photo
    Puffball fungus spores
    Coloured scanning electron micrograph of tardigrade water bear. — Stock Photo
    Coloured scanning electron micrograph of tardigrade water bear.
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Dental plaque scanning electron micrograph — Stock Photo
    Dental plaque scanning electron micrograph
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture
    Nanostructures formed on nickel surface — Stock Photo
    Nanostructures formed on nickel surface
    Osteosarcoma cancer cell — Stock Photo
    Osteosarcoma cancer cell
    Blade of grass with a serrated edge — Stock Photo
    Blade of grass with a serrated edge
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets. — Stock Photo
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets.
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Sperm cells in seminiferous tubules — Stock Photo
    Sperm cells in seminiferous tubules
    Centric fossil diatom frustule — Stock Photo
    Centric fossil diatom frustule
    White blood cells — Stock Photo
    White blood cells
    Pseudomonas aeruginosa bacteria — Stock Photo
    Pseudomonas aeruginosa bacteria
    Stick insect foot — Stock Photo
    Stick insect foot
    Lychnocanoma radiolarian shell — Stock Photo
    Lychnocanoma radiolarian shell
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Lymphocyte white blood cell — Stock Photo
    Lymphocyte white blood cell
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system — Stock Photo
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system
    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.
    Bluebottle fly head — Stock Photo
    Bluebottle fly head
    Acrospaera radiolarian shell — Stock Photo
    Acrospaera radiolarian shell
    Dog tapeworm head — Stock Photo
    Dog tapeworm head
    Soil bacteria, coloured scanning electron micrograph. — Stock Photo
    Soil bacteria, coloured scanning electron micrograph.
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Bacteria found in a sample of human faeces — Stock Photo
    Bacteria found in a sample of human faeces
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Coloured scanning electron micrograph of bacteria cultured from mobile phone surface. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone surface.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph. — Stock Photo
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph.
    Coloured scanning electron micrograph of breast cancer cell. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cell.
    Woodland skipper butterfly compound eye — Stock Photo
    Woodland skipper butterfly compound eye
    Surface of the small intestine — Stock Photo
    Surface of the small intestine