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    Coloured scanning electron micrograph (SEM) of a sectioned artery containing red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a sectioned artery containing red blood cells (erythrocytes, red).
    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    3d illustration of transparent sperm cells swimming towards egg cell. — Stock Photo
    3d illustration of transparent sperm cells swimming towards egg cell.
    Sperm spermatozoa swimming towards egg cell, colored digital illustration. — Stock Photo
    Sperm spermatozoa swimming towards egg cell, colored digital illustration.
    Brain cancer, conceptual computer illustration — Stock Photo
    Brain cancer, conceptual computer illustration
    Cancer cell morphology — Stock Photo
    Cancer cell morphology
    Antibodies attacking cancer cell, computer illustration — Stock Photo
    Antibodies attacking cancer cell, computer illustration
    Lymphocyte white blood cell, digital illustration. — Stock Photo
    Lymphocyte white blood cell, digital illustration.
    Colored digital illustration of green cancer cell. — Stock Photo
    Colored digital illustration of green cancer cell.
    Apoptosis of neuron cell — Stock Photo
    Apoptosis of neuron cell
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Cancer cell with filaments — Stock Photo
    Cancer cell with filaments
    Human embryonic stem cell on pin tip, conceptual digital artwork. — Stock Photo
    Human embryonic stem cell on pin tip, conceptual digital artwork.
    Illustration of 2 cell stage egg on blue background. — Stock Photo
    Illustration of 2 cell stage egg on blue background.
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Nerve cell, computer illustration — Stock Photo
    Nerve cell, computer illustration
    Migrating breast cancer cell, digital 3d illustration. — Stock Photo
    Migrating breast cancer cell, digital 3d illustration.
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration
    Section through the cerebellum in the brain — Stock Photo
    Section through the cerebellum in the brain
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Antibodies attacking cancer cell, computer illustration — Stock Photo
    Antibodies attacking cancer cell, computer illustration
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death. — Stock Photo
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death.
    Nerve cells and axon connections — Stock Photo
    Nerve cells and axon connections
    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 pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Immune system T-lymphocytes cells binding antigen, digital illustration. — Stock Photo
    Immune system T-lymphocytes cells binding antigen, digital illustration.
    3d rendered illustration of purple nerve cell. — Stock Photo
    3d rendered illustration of purple nerve cell.
    Magnified digital illustration of blastocyst cell. — Stock Photo
    Magnified digital illustration of blastocyst cell.
    Astrocyte glial nerve cell, digital illustration. — Stock Photo
    Astrocyte glial nerve cell, digital illustration.
    Animal cell during cytokinesis cell division, digital illustration. — Stock Photo
    Animal cell during cytokinesis cell division, digital illustration.
    3d illustration of transparent sperm cells swimming towards egg cell. — Stock Photo
    3d illustration of transparent sperm cells swimming towards egg cell.
    3d illustration of Ebola virus causing viral haemorrhagic fever in bloodstream with red and white blood cells. — Stock Photo
    3d illustration of Ebola virus causing viral haemorrhagic fever in bloodstream with red and white blood cells.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    White blood cell and proteins, digital illustration. — Stock Photo
    White blood cell and proteins, digital illustration.
    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.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Illustration of transparent stem cell on blue background. — Stock Photo
    Illustration of transparent stem cell on blue background.
    Digital illustration showing inclusion composed of chlamydia reticulate bodies near nucleus of cell. — Stock Photo
    Digital illustration showing inclusion composed of chlamydia reticulate bodies near nucleus of cell.
    Close-up of cell culture plates on white background. — Stock Photo
    Close-up of cell culture plates on white background.
    Cancer cells on tissue surface — Stock Photo
    Cancer cells on tissue surface
    Colored scanning electron micrograph of osteoblast osteocyte bone cell. — Stock Photo
    Colored scanning electron micrograph of osteoblast osteocyte bone cell.
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Unicellular fungus Candida auris — Stock Photo
    Unicellular fungus Candida auris
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Cancer cell with filaments — Stock Photo
    Cancer cell with filaments
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Red blood cells and platelets, computer illustration. — Stock Photo
    Red blood cells and platelets, computer illustration.
    Lining of the small intestine — Stock Photo
    Lining of the small intestine
    Illustration of 2 cell stage egg on black background. — Stock Photo
    Illustration of 2 cell stage egg on black background.
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Cancer cell with filaments — Stock Photo
    Cancer cell with filaments
    Human embryonic stem cell on pin tip, conceptual digital artwork. — Stock Photo
    Human embryonic stem cell on pin tip, conceptual digital artwork.
    Digital illustration of colorful Polio virus particle. — Stock Photo
    Digital illustration of colorful Polio virus particle.