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    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a foetal vein filled with red blood cells (erythrocytes, red).
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Red blood cells in an artery — Stock Photo
    Red blood cells in an artery
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells flowing inside an artery — Stock Photo
    Red blood cells flowing inside an artery
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells — Stock Photo
    Red blood cells
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Red blood cells flowing inside an artery — Stock Photo
    Red blood cells flowing inside an artery
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle