• Blood type is a way to describe the type of antigens, or proteins, on the surface of red blood cells (RBCs) There are four blood types; A, B, AB, and O.
  • A blood transfusion is the process of putting blood or blood products from one person into the circulatory system of another person.
  • The blood type of the recipient needs to be carefully matched to the blood types of the donor.
  • The second most important blood group system is the Rhesus (Rh) factor.
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