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    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Simple columnar epithelium, light micrograph — Stock Photo
    Simple columnar epithelium, light micrograph
    3d illustration of human sperm cells in reproductive process. — Stock Photo
    3d illustration of human sperm cells in reproductive process.
    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.
    Normal human sperm cells — Stock Photo
    Normal human sperm cells
    Digital 3d illustration of transmitting nerve cells. — Stock Photo
    Digital 3d illustration of transmitting nerve cells.
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    Illustration of a cancer cell. — Stock Photo
    Illustration of a cancer cell.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Illustration of lipid blood clot in circulatory system. — Stock Photo
    Illustration of lipid blood clot in circulatory system.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Digital illustration of cancerous tumor in lungs and close-up of lung cancer cells. — Stock Photo
    Digital illustration of cancerous tumor in lungs and close-up of lung cancer cells.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa. — Stock Photo
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa.
    Dead, dying and healthy red blood cells, conceptual digital illustration. — Stock Photo
    Dead, dying and healthy red blood cells, conceptual digital illustration.
    Digital artwork of human cells with cytomegalic inclusion disease symptom of cytomegalovirus infection. — Stock Photo
    Digital artwork of human cells with cytomegalic inclusion disease symptom of cytomegalovirus infection.
    Monocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Monocyte white blood cell in blood smear, digital illustration.
    3d illustration of red transparent sperm cells swimming towards egg cell. — Stock Photo
    3d illustration of red transparent sperm cells swimming towards egg cell.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    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.
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration
    Digital illustration and light micrograph of squamous cell carcinoma of lung. — Stock Photo
    Digital illustration and light micrograph of squamous cell carcinoma of lung.
    Human brain with close-up view of neurons, computer illustration. — Stock Photo
    Human brain with close-up view of neurons, computer illustration.
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female — Stock Photo
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female
    3d illustration of sperm cells approaching egg cell on colorful blue background. — Stock Photo
    3d illustration of sperm cells approaching egg cell on colorful blue background.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Normal human sperm cells — Stock Photo
    Normal human sperm cells
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Digital illustration showing vaginitis caused by Candida albicans fungus and close-up of yeast cells. — Stock Photo
    Digital illustration showing vaginitis caused by Candida albicans fungus and close-up of yeast cells.
    Activated platelet cells — Stock Photo
    Activated platelet cells
    Bacteria and viruses in human artery, digital illustration. — Stock Photo
    Bacteria and viruses in human artery, digital illustration.
    Close-up of human hand taking piece of honeycomb from plate — Stock Photo
    Close-up of human hand taking piece of honeycomb from plate
    Illustration of human skin anatomy on white background. — Stock Photo
    Illustration of human skin anatomy on white background.
    Human brain with connections showing activity, conceptual illustration. — Stock Photo
    Human brain with connections showing activity, conceptual illustration.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia. — Stock Photo
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Illustration of illuminated cancer cell on black background. — Stock Photo
    Illustration of illuminated cancer cell on black background.
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain.
    Red blood cells — Stock Photo
    Red blood cells
    Nerve cell structure — Stock Photo
    Nerve cell structure
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    Ovarian cells section — Stock Photo
    Ovarian cells section
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells — Stock Photo
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    HIV human immunodeficiency virus in bloodstream, digital illustration — Stock Photo
    HIV human immunodeficiency virus in bloodstream, digital illustration
    Illustration of abnormal red blood cells known as spur cells acanthocytes. — Stock Photo
    Illustration of abnormal red blood cells known as spur cells acanthocytes.
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization. — Stock Photo
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization.
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    Sperm cell, or spermatozoa — Stock Photo
    Sperm cell, or spermatozoa
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.