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    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph. — Stock Photo
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph.
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    City skyline with stadium at False Creek, Vancouver, British Columbia, Canada — Stock Photo
    City skyline with stadium at False Creek, Vancouver, British Columbia, Canada
    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
    Normal head and brain — Stock Photo
    Normal head and brain
    Trendy homosexual man with long nails in ornamental shirt looking at camera while squatting on pavement against wall — Stock Photo
    Trendy homosexual man with long nails in ornamental shirt looking at camera while squatting on pavement against wall
    Closeup of a denture in a laboratory — Stock Photo
    Closeup of a denture in a laboratory
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Horse chestnut leaf. Coloured scanning electron micrograph (SEM) of the underside of a horse chestnut leaf (Aesculus hippocastanum) Numerous hairs (trichomes) cover the surface — Stock Photo
    Horse chestnut leaf. Coloured scanning electron micrograph (SEM) of the underside of a horse chestnut leaf (Aesculus hippocastanum) Numerous hairs (trichomes) cover the surface
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Digital illustration of cell in early stage of programmed cell death. — Stock Photo
    Digital illustration of cell in early stage of programmed cell death.
    Colored computed tomography scan of brain section of senior female patient with glioblastoma brain cancer. — Stock Photo
    Colored computed tomography scan of brain section of senior female patient with glioblastoma brain cancer.
    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.
    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
    Lineata moon shells, coloured X-ray. — Stock Photo
    Lineata moon shells, coloured X-ray.
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti. — Stock Photo
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti.
    Black colleagues examining denture in laboratory — Stock Photo
    Black colleagues examining denture in laboratory
    Woodland skipper butterfly — Stock Photo
    Woodland skipper butterfly
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    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
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Cape Pankof On Unimak Island — Stock Photo
    Cape Pankof On Unimak Island
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration. — Stock Photo
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration.
    Female dentist cleaning dental jaw model with toothbrush in clinic — Stock Photo
    Female dentist cleaning dental jaw model with toothbrush in clinic
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum. — Stock Photo
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum.
    Crystalline lens of the eye — Stock Photo
    Crystalline lens of the eye
    Cotton bud with ear wax embedded in fibres, coloured scanning electron micrograph (SEM). — Stock Photo
    Cotton bud with ear wax embedded in fibres, coloured scanning electron micrograph (SEM).
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Cambie Bridge in city skyline with stadium at False Creek, Vancouver, British Columbia, Canada — Stock Photo
    Cambie Bridge in city skyline with stadium at False Creek, Vancouver, British Columbia, Canada
    Male dentist cleaning dental jaw model with toothbrush in clinic — Stock Photo
    Male dentist cleaning dental jaw model with toothbrush in clinic
    Silhouette with lungs pneumonia caused by measles virus, conceptual illustration. — Stock Photo
    Silhouette with lungs pneumonia caused by measles virus, conceptual illustration.
    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
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin — Stock Photo
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin
    Releasing a false albacore at the boat off the Atlantic coast — Stock Photo
    Releasing a false albacore at the boat off the Atlantic coast
    Centric fossil diatom frustule — Stock Photo
    Centric fossil diatom frustule
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    African American guy in latex gloves using mouth mirror and probe to check false teeth while working in modern laboratory — Stock Photo
    African American guy in latex gloves using mouth mirror and probe to check false teeth while working in modern laboratory
    Arthritic hand anatomy — Stock Photo
    Arthritic hand anatomy
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Coloured scanning electron micrograph (SEM) of Breakfast food (cereal) corn flake. — Stock Photo
    Coloured scanning electron micrograph (SEM) of Breakfast food (cereal) corn flake.
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    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
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti. — Stock Photo
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti.
    Digital illustration of multiple threadworms in human intestine. — Stock Photo
    Digital illustration of multiple threadworms in human intestine.
    Colored scanning electron micrograph of cancellous bone tissue from starling bird skull. — Stock Photo
    Colored scanning electron micrograph of cancellous bone tissue from starling bird skull.
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria. — Stock Photo
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria.
    Coho Salmon, also known as Silver Salmon (Oncorhynchus kisutch) in the act of spawning in an Alaskan stream during autumn; Alaska, United States of America — Stock Photo
    Coho Salmon, also known as Silver Salmon (Oncorhynchus kisutch) in the act of spawning in an Alaskan stream during autumn; Alaska, United States of America
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Plaque-forming bacteria — Stock Photo
    Plaque-forming bacteria
    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.
    Bacteria found in a sample of human faeces — Stock Photo
    Bacteria found in a sample of human faeces
    Sperm cells in seminiferous tubules — Stock Photo
    Sperm cells in seminiferous tubules
    Dentures on table against white background. — Stock Photo
    Dentures on table against white background.
    Fisherman holding striper fish in Boston harbour. Boston, Massachusetts, United States of America — Stock Photo
    Fisherman holding striper fish in Boston harbour. Boston, Massachusetts, United States of America
    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.
    Allergenic pet dander on dog hair, colored scanning electron micrograph. — Stock Photo
    Allergenic pet dander on dog hair, colored scanning electron micrograph.
    Ankle of patient with osteoarthritis — Stock Photo
    Ankle of patient with osteoarthritis
    Briefcase with various items, coloured X-ray. — Stock Photo
    Briefcase with various items, coloured X-ray.