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    Colored scanning electron micrograph showing urethral epithelium of urethra. — Stock Photo
    Colored scanning electron micrograph showing urethral epithelium of urethra.
    Lung tissue, coloured transmission electron micrograph (TEM). — Stock Photo
    Lung tissue, coloured transmission electron micrograph (TEM).
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green) — Stock Photo
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green)
    Mobile phone speaker, colored scanning electron micrograph. — Stock Photo
    Mobile phone speaker, colored scanning electron micrograph.
    Cat flea head — Stock Photo
    Cat flea head
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph. — Stock Photo
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Bird bone tissue — Stock Photo
    Bird bone tissue
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Copepod, coloured scanning electron micrograph (SEM). — Stock Photo
    Copepod, coloured scanning electron micrograph (SEM).
    Nanostructures formed on nickel surface — Stock Photo
    Nanostructures formed on nickel surface
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Red blood cells — Stock Photo
    Red blood cells
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot
    Pollen grains of a common daisy — Stock Photo
    Pollen grains of a common daisy
    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
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    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.
    Blood clot formation — Stock Photo
    Blood clot formation
    Coloured scanning electron micrograph of surface of prostate cancer cells. — Stock Photo
    Coloured scanning electron micrograph of surface of prostate cancer cells.
    House dust mites — Stock Photo
    House dust mites
    Cat flea head — Stock Photo
    Cat flea head
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Micrograph of tendon fibres — Stock Photo
    Micrograph of tendon fibres
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube
    Copepod, coloured scanning electron micrograph (SEM). — Stock Photo
    Copepod, coloured scanning electron micrograph (SEM).
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    External mineralised structures of coccolithophores — Stock Photo
    External mineralised structures of coccolithophores
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    Crystalline lens of the eye — Stock Photo
    Crystalline lens of the eye
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans — Stock Photo
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Red blood cells — Stock Photo
    Red blood cells
    Colored scanning electron micrograph of rod-shaped Gram-negative bacteria Escherichia coli, commonly known as E coli. — Stock Photo
    Colored scanning electron micrograph of rod-shaped Gram-negative bacteria Escherichia coli, commonly known as E coli.
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum. — Stock Photo
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum.
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Colored scanning electron micrograph of anthrax gram-positive, rod-shaped bacteria known as Bacillus anthracis. — Stock Photo
    Colored scanning electron micrograph of anthrax gram-positive, rod-shaped bacteria known as Bacillus anthracis.
    Coloured scanning electron micrograph of cancer cells migrating down pores. — Stock Photo
    Coloured scanning electron micrograph of cancer cells migrating down pores.
    Climbing lily pollen — Stock Photo
    Climbing lily pollen
    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
    Male sex cell — Stock Photo
    Male sex cell
    Abutilon pollen grain — Stock Photo
    Abutilon pollen grain
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Morphology of Activated platelets — Stock Photo
    Morphology of Activated platelets
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae. — Stock Photo
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae.
    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
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse. — Stock Photo
    Colored scanning electron micrograph of Liposcelis divinatorius booklouse.