04.What makes some blood J groups incompatible while others are universal?
Your blood type is determined by protein markers known as
antigens on the surface of your red blood cells. You can have A antigens, B
antigens, or none - in which case you're blood type 0. However, if you don't
have the antigen, your antibodies will attack foreign blood. If you're type A
and you're given B, your antibodies attack the B antigens. However, if you're
blood type AB, you can safely receive any type. Those who are blood group 0
have no antigens so can give blood to anyone, but they have antibodies to A and
B so can only receive 0 back!
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