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    Nerves synapse, biological digital illustration. — Stock Photo
    Nerves synapse, biological digital illustration.
    Nerve cell, computer illustration — Stock Photo
    Nerve cell, computer illustration
    Female researcher holding medium tray. — Stock Photo
    Female researcher holding medium tray.
    Human T-cell lymphotropic virus particle, digital conceptual illustration. — Stock Photo
    Human T-cell lymphotropic virus particle, digital conceptual illustration.
    Red blood cells with fibrin — Stock Photo
    Red blood cells with fibrin
    Erythrocytes or red blood cells — Stock Photo
    Erythrocytes or red blood cells
    Cancer cells and blood vessels — Stock Photo
    Cancer cells and blood vessels
    Strands of Actinomyces viscosus — Stock Photo
    Strands of Actinomyces viscosus
    Cancer cell attacked by T cell — Stock Photo
    Cancer cell attacked by T cell
    Climbing lily pollen — Stock Photo
    Climbing lily pollen
    Tumor, illustration — Stock Photo
    Tumor, illustration
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Enterococcus bacteria colony — Stock Photo
    Enterococcus bacteria colony
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Cancer cell attacked by T cell — Stock Photo
    Cancer cell attacked by T cell
    Close-up of rack of cell cultures in bottles in laboratory. — Stock Photo
    Close-up of rack of cell cultures in bottles in laboratory.
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Cells trapped in fibrin protein mesh — Stock Photo
    Cells trapped in fibrin protein mesh
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa. — Stock Photo
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa.
    3d rendered illustration of human nerve cell. — Stock Photo
    3d rendered illustration of human nerve cell.
    Streptomyces coelicoflavus bacteria — Stock Photo
    Streptomyces coelicoflavus bacteria
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Red blood cells in an artery — Stock Photo
    Red blood cells in an artery
    Sperm spermatozoa swimming towards egg cell, colored digital illustration. — Stock Photo
    Sperm spermatozoa swimming towards egg cell, colored digital illustration.
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body. — Stock Photo
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body.
    Human sperm approaching egg cell — Stock Photo
    Human sperm approaching egg cell
    3d illustration of egg cell frozen into ice cube. — Stock Photo
    3d illustration of egg cell frozen into ice cube.
    Illustration of single human blood cell on white background. — Stock Photo
    Illustration of single human blood cell on white background.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Escherichia coli bacteria on gecko tongue — Stock Photo
    Escherichia coli bacteria on gecko tongue
    Virus in human blood, computer illustration. — Stock Photo
    Virus in human blood, computer illustration.
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration. These Gram-positive spherical bacteria are usually found in pairs. They colonize respiratory tract asymptomatically in healthy carriers, but can cause pneumonia — Stock Photo
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration. These Gram-positive spherical bacteria are usually found in pairs. They colonize respiratory tract asymptomatically in healthy carriers, but can cause pneumonia
    Digital illustration of nerve neuron cell. — Stock Photo
    Digital illustration of nerve neuron cell.
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. — Stock Photo
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba.
    Cancer cell anatomy — Stock Photo
    Cancer cell anatomy
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Cytotoxic T-cells capturing cancer cells, digital illustration. — Stock Photo
    Cytotoxic T-cells capturing cancer cells, digital illustration.
    Lung tissue, coloured transmission electron micrograph (TEM). — Stock Photo
    Lung tissue, coloured transmission electron micrograph (TEM).
    Illustration of pink stem cell on blue background. — Stock Photo
    Illustration of pink stem cell on blue background.
    Illustration of blue cell membrane on white background. — Stock Photo
    Illustration of blue cell membrane on white background.
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes.
    Virus particles in blood stream, digital illustration. — Stock Photo
    Virus particles in blood stream, digital illustration.
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grain cell from hollyhock hibiscus flower.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Cancer cell anatomy — Stock Photo
    Cancer cell anatomy
    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.
    Magnified digital illustration of fertilisation of egg cell. — Stock Photo
    Magnified digital illustration of fertilisation of egg cell.
    Stem cell cultures on weighed in laboratory. — Stock Photo
    Stem cell cultures on weighed in laboratory.
    Stages of autophagy mechanism — Stock Photo
    Stages of autophagy mechanism
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Lysosome fusing with autophagosome — Stock Photo
    Lysosome fusing with autophagosome
    HIV viruses infecting T-lymphocyte cell — Stock Photo
    HIV viruses infecting T-lymphocyte cell
    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    Migrating cancer cell — Stock Photo
    Migrating cancer cell