Dec 3, 2020
ABO Groups
-- determined by the presence or absence of antigens A and B -- type A blood has only antigen A -- type B blood has only antigen B -- type AB blood has antigens A and B -- type O blood has neither antigen
-- blood contains antibodies against the antigens the red blood cells don’t have -- type A blood has B antibodies -- type B blood has A antibodies -- type AB blood has no antibodies -- type O blood has both A and B antibodies
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