Blood Group
The differences in human blood are due to the presence or absence of certain protein molecules called antigens and antibodies. – The antigens are located on the surface of the RBCs and the antibodies are in the blood plasma. – Individuals have different types and combinations of these molecules. – The blood group you belong to depends on what you have inherited from your parents.
• According to the ABO blood typing system there are four different kinds of blood types: A, B, AB or O (null)
Blood group O is called “universal donor” because it has no antigens on RBC.
Blood group AB are called “universal receivers“ because it has no anti- bodies in the plasma.
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