ANATOMY

Detailed explanation-1: -To get a blood transfusion safely, a person’s immune system must recognize the donor cells as a match to his or her own cells. If a match isn’t recognized, the cells are rejected. The immune system makes proteins called antibodies that act as protectors if foreign cells enter the body.

Detailed explanation-2: -For example, people with type A blood will have the A antigen on the surface of their red cells (as shown in the table below). As a result, anti-A antibodies will not be produced by them because they would cause the destruction of their own blood.

Detailed explanation-3: -Red blood cell antigens determine your blood group The antigens expressed on the red blood cell determine an individual’s blood group. The main two blood groups are called ABO (with blood types A, B, AB, and O) and Rh (with Rh D-positive or Rh D-negative blood types).