MICROANATOMY

Detailed explanation-1: -Group O can donate red blood cells to anybody. It’s the universal donor. Group AB can donate to other AB’s but can receive from all others. Group B can donate red blood cells to B’s and AB’s.

Detailed explanation-2: -Type O blood is called the universal donor because: It has neither A nor B surface antigens on the red blood cells. Antigens are proteins that are capable of evoking an allergic response in someone whose whole body does not have the antigens.

Detailed explanation-3: -O negative is the universal blood type. O negative blood type can only receive O negative blood. O negative donors who are CMV negative are known as Heroes for Babies at the Red Cross because it is the safest blood for transfusions for immune deficient newborns. Learn more about how you can be a Hero for a Baby.