Answer true or false for each question. Check the answers below, after you are done. A mini physical is given before the blood donation to determine eligibility. Donors should eat heartily before donating. The entire process takes two hours.
Blood carries oxygen, water and food to all cells of the body.
It is estimated that blood can make a complete round of the circulatory system in about one day. The most common blood disease is leukemia. The main function of red cells is to transport oxygen from the lungs to the tissues and to transport carbon dioxide from the tissues to the lungs. The main function of white cells is to fight infection and help develop immunity. The main function of platelets is to control bleeding.