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    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM). — Stock Photo
    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM).
    Mucosa of the trachea — Stock Photo
    Mucosa of the trachea
    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.
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Portrait of young woman in sunglasses smoking electronic cigarette on beach in barcelona — Stock Photo
    Portrait of young woman in sunglasses smoking electronic cigarette on beach in barcelona
    Colored scanning electron micrograph showing urethral epithelium of urethra. — Stock Photo
    Colored scanning electron micrograph showing urethral epithelium of urethra.
    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
    Oligodendrocyte cell structure — Stock Photo
    Oligodendrocyte cell structure
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth. — Stock Photo
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth.
    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.
    Casual businesswoman relaxing with headphones and digital tablet on bean bag chair — Stock Photo
    Casual businesswoman relaxing with headphones and digital tablet on bean bag chair
    Bacteria forming Dental plaque — Stock Photo
    Bacteria forming Dental plaque
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times — Stock Photo
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Business people using digital tablet in airport — Stock Photo
    Business people using digital tablet in airport
    Schizosaccharomyces pombe yeast — Stock Photo
    Schizosaccharomyces pombe yeast
    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
    Businessman using digital tablet at home — Stock Photo
    Businessman using digital tablet at home
    Side view of sitting businessman using mobile phone in the modern office with coworkers discussing over digital tablet int he background — Stock Photo
    Side view of sitting businessman using mobile phone in the modern office with coworkers discussing over digital tablet int he background
    Dog hair, coloured scanning electron micrograph (SEM). — Stock Photo
    Dog hair, coloured scanning electron micrograph (SEM).
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Mechanic using electronic diagnostic device in repair garage — Stock Photo
    Mechanic using electronic diagnostic device in repair garage
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Surface of the foot of a common pollen beetle — Stock Photo
    Surface of the foot of a common pollen beetle
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    Human blood cells — Stock Photo
    Human blood cells
    Plaque-forming bacteria — Stock Photo
    Plaque-forming bacteria
    Colored scanning electron micrograph of red blood cells. — Stock Photo
    Colored scanning electron micrograph of red blood cells.
    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
    Dog hair, coloured scanning electron micrograph (SEM).In dogs several hairs emerge from a single follicle. — Stock Photo
    Dog hair, coloured scanning electron micrograph (SEM).In dogs several hairs emerge from a single follicle.
    Dense connective tissue, coloured scanning electron micrograph (SEM). — Stock Photo
    Dense connective tissue, coloured scanning electron micrograph (SEM).
    Smiling casual businesswoman using digital tablet in office — Stock Photo
    Smiling casual businesswoman using digital tablet in office
    Businessmen drinking coffee using digital tablet at urban sidewalk cafe — Stock Photo
    Businessmen drinking coffee using digital tablet at urban sidewalk cafe
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    Asparagus pollen grains — Stock Photo
    Asparagus pollen grains
    Photosynthetic Navicula sp. diatom — Stock Photo
    Photosynthetic Navicula sp. diatom
    Boy using digital tablet under sheet — Stock Photo
    Boy using digital tablet under sheet
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Side view of woman in sunglasses smoking electronic cigarette on street in barcelona — Stock Photo
    Side view of woman in sunglasses smoking electronic cigarette on street in barcelona
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    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.
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Sarcoptic mange mites eggs — Stock Photo
    Sarcoptic mange mites eggs
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Senior man using digital tablet on patio — Stock Photo
    Senior man using digital tablet on patio
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Fracture through the thyroid gland — Stock Photo
    Fracture through the thyroid gland
    Man repairing an electronic device using soldering iron in service center — Stock Photo
    Man repairing an electronic device using soldering iron in service center
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Men using digital tablet and drinking coffee at restaurant table — Stock Photo
    Men using digital tablet and drinking coffee at restaurant table
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Teenage girl with digital tablet doing homework at desk — Stock Photo
    Teenage girl with digital tablet doing homework at desk
    Influenza viruses budding from host cell — Stock Photo
    Influenza viruses budding from host cell
    Senior woman using digital tablet and relaxing in summer hammock — Stock Photo
    Senior woman using digital tablet and relaxing in summer hammock
    Woman using digital tablet in living room — Stock Photo
    Woman using digital tablet in living room
    Osteoporotic bone abnormality — Stock Photo
    Osteoporotic bone abnormality
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Solar panels against blue sky with white clouds — Stock Photo
    Solar panels against blue sky with white clouds