|The hematic system is composed of blood and the vessels that carry the blood throughout the body The solid portion of blood is composed of three different types of cells: Erythrocytes - also called red blood cells (RBCs),they have the important function of transport Oxygen and Carbondioxide throughout the body. The vehicle for this transportation is a protein-iron pigment called hemoglobin. Leukocytes - also called white blood cells (ABCs) ,they protect the body against microorganism, further sub classification is of two main types of WBCs: granulocytes(Eosinophils, Neutrophils, Basophils) and agranulocytes (Monocytes and lymphocytes) Thrombocytes - also called clotting cells, cell fragments, or platelets
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