Bring the card with you each time you give. The ABO and Rh blood groups are the most important because they determine the compatibility of donated blood with its recipient. The chart below indicates the percentages of the ABO and Rh factors in our donor population. The average adult's body contains 10 to 12 pints of blood. Blood transports nutrient.
Blood consists of plasma, red blood cells, white blood cells and platelets.
Red blood cells receive oxygen from the lungs and deliver it throughout the body. Red cells are produced in the bone marrow. White blood cells identify and attack infections. Platelets control bleeding by attaching to an injured surface and forming a clot. Some facts about iron Your hemoglobin, an iron-containing protein, will be checked each time you come to donate blood.