Explain Blood type
the four blood groups are A, B, AB, and O. Each are defined by the antigens that exist with the blood. A antigen is type A, B antigen is type B. Typa AB has BOTH anitgens, and type O has none.
O is the universal Donor, AB is the universal recipient
If blood with a foriegn (Anitgen to B antibody or v.v.) antigen is found, the body will destroy it.