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    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM). — Stock Photo
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM).
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Coloured scanning electron micrograph (SEM) of human myeloid white blood cells found in bone marrow. — Stock Photo
    Coloured scanning electron micrograph (SEM) of human myeloid white blood cells found in bone marrow.
    Ruptured venule running through fatty tissue — Stock Photo
    Ruptured venule running through fatty tissue
    Mucosa of the trachea — Stock Photo
    Mucosa of the trachea
    Blood cells in a blood vessel — Stock Photo
    Blood cells in a blood vessel
    Pathological anatomy of atherosclerosis — Stock Photo
    Pathological anatomy of atherosclerosis
    Cut in an artery seen from its interior — Stock Photo
    Cut in an artery seen from its interior
    Atherosclerosis harming blood vessel — Stock Photo
    Atherosclerosis harming blood vessel
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    Blood stream and artery walls — Stock Photo
    Blood stream and artery walls
    Normal human red blood cell — Stock Photo
    Normal human red blood cell
    Red blood cells — Stock Photo
    Red blood cells
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Red blood cells — Stock Photo
    Red blood cells
    Normal human red blood cell — Stock Photo
    Normal human red blood cell
    Blood stream and artery walls — Stock Photo
    Blood stream and artery walls
    Visual rendering of Sleeping sickness — Stock Photo
    Visual rendering of Sleeping sickness
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Red blood cells — Stock Photo
    Red blood cells
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Blood stream and artery walls — Stock Photo
    Blood stream and artery walls
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Human blood cells — Stock Photo
    Human blood cells
    Blood stream and artery walls — Stock Photo
    Blood stream and artery walls
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Normal blood cells in artery — Stock Photo
    Normal blood cells in artery
    Human blood cells — Stock Photo
    Human blood cells
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Red blood cells — Stock Photo
    Red blood cells
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Red blood cells — Stock Photo
    Red blood cells
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells — Stock Photo
    Red blood cells
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Healthy red blood cells — Stock Photo
    Healthy red blood cells
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Red blood cells in blood stream — Stock Photo
    Red blood cells in blood stream
    Normal red blood cells — Stock Photo
    Normal red blood cells