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    Illustration of group of cells in blood clot. — Stock Photo
    Illustration of group of cells in blood clot.
    Colored scanning electron micrograph of cancer cells from human colon. — Stock Photo
    Colored scanning electron micrograph of cancer cells from human colon.
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Stages of autophagy mechanism — Stock Photo
    Stages of autophagy mechanism
    3d illustration of human sperm cells in reproductive process. — Stock Photo
    3d illustration of human sperm cells in reproductive process.
    Cancer cell morphology — Stock Photo
    Cancer cell morphology
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Human bone marrow, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human bone marrow, light micrograph. Haematoxylin and eosin stain.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    3d digital illustration of unicellular yeast fungus Candida auris. — Stock Photo
    3d digital illustration of unicellular yeast fungus Candida auris.
    3d digital illustration of unicellular yeast fungus Candida auris. — Stock Photo
    3d digital illustration of unicellular yeast fungus Candida auris.
    Human brain with close-up view of neurons, computer illustration. — Stock Photo
    Human brain with close-up view of neurons, computer illustration.
    3d illustration of cholera pathogens in dark polluted water. — Stock Photo
    3d illustration of cholera pathogens in dark polluted water.
    Activation of Ras proteins, digital illustration. — Stock Photo
    Activation of Ras proteins, digital illustration.
    Illustration of motor protein cellular structure. — Stock Photo
    Illustration of motor protein cellular structure.
    Sperm cells, abstract digital illustration. — Stock Photo
    Sperm cells, abstract digital illustration.
    Eosinophilia blood smear with numerous eosinophils, digital illustration. — Stock Photo
    Eosinophilia blood smear with numerous eosinophils, digital illustration.
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Illustration of human blood cells on white background. — Stock Photo
    Illustration of human blood cells on white background.
    Animal cells during cytokinesis (cell division), illustration — Stock Photo
    Animal cells during cytokinesis (cell division), illustration
    3d illustration of leukocyte cells secreting allergen antibodies while allergy. — Stock Photo
    3d illustration of leukocyte cells secreting allergen antibodies while allergy.
    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem. — Stock Photo
    Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids, a type of xylem.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Coronavirus infection, conceptual illustration. — Stock Photo
    Coronavirus infection, conceptual illustration.
    Technician checking stem cell cultures in bioengineering laboratory. — Stock Photo
    Technician checking stem cell cultures in bioengineering laboratory.
    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant. — Stock Photo
    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple. — Stock Photo
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Visual rendering of Human cells — Stock Photo
    Visual rendering of Human cells
    Lysosome fusing with autophagosome — Stock Photo
    Lysosome fusing with autophagosome
    Illustration different types of polymeric nanoparticles used for drug delivery. From clockwise: nanosphere (top left), dendrimer (top right), polymer micelle (bottom right) and polymersome (bottom left). — Stock Photo
    Illustration different types of polymeric nanoparticles used for drug delivery. From clockwise: nanosphere (top left), dendrimer (top right), polymer micelle (bottom right) and polymersome (bottom left).
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Human embryo with four cells — Stock Photo
    Human embryo with four cells
    Human cell, computer illustration — Stock Photo
    Human cell, computer illustration
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept. — Stock Photo
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept.
    Zika virus particles transmitted by mosquito bite and neuron cell, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite and neuron cell, digital illustration.
    Human ovary structure — Stock Photo
    Human ovary structure
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria. — Stock Photo
    Digital artwork showing inclusion composed of group of chlamydia reticulate bodies of Chlamydia trachomatis bacteria.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    Megakaryocyte in human blood, computer illustration. — Stock Photo
    Megakaryocyte in human blood, computer illustration.
    Digital illustration of shaped virus cells. — Stock Photo
    Digital illustration of shaped virus cells.
    Nanobot in bloodstream with red erythrocytes, digital illustration. — Stock Photo
    Nanobot in bloodstream with red erythrocytes, digital illustration.
    Cell membrane structure, digital illustration. — Stock Photo
    Cell membrane structure, digital illustration.
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei. — Stock Photo
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Digital illustration of budding Saccharomyces cerevisiae yeast cells. — Stock Photo
    Digital illustration of budding Saccharomyces cerevisiae yeast cells.
    Cancer cell, computer illustration. — Stock Photo
    Cancer cell, computer illustration.
    Unicellular fungus Candida auris — Stock Photo
    Unicellular fungus Candida auris
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Conceptual illustration showing virus infecting neurons of brain. — Stock Photo
    Conceptual illustration showing virus infecting neurons of brain.
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres