anemia. close-up of blood vessel with erythrocyte, platelets and white blood cells lymphocytes

amount anaemia anatomy anemia anemic artery biology blood body care cell cells circulatory close closeup comparison decrease deficiency diagram difference disease erythrocyte flow health healthy hematology hemoglobin human illness illustration iron level levels lymphocytes macro medical medicine microbiology microscopic normal platelet platelets rbcs red science total vector vein vessel white zoom