Biology
Why is it necessary to know the blood groups before giving transfusion?
Circulatory System
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Answer
Sometimes it becomes necessary to inject blood into the body of patients undergoing surgical operation. This is called blood transfusion. It is important that the blood groups of the donor and the recipient should be compatible. So, to prevent the blood cells of the donor to be destroyed by the antibodies of the recipient it is necessary to know the blood group before transfusion.
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