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Another serum with anti-B antibodies is mixed with the remaining sample.

Whether or not agglutination occurs in either sample indicates the ABO type.

Since some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching.

There are 4 major blood groups determined by the presence or absence of two antigens (A and B) on the surface of red blood cells: In addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present ( ) or absent ( - ).

If two different blood types are mixed together, the blood cells may begin to clump together in the blood vessels, causing a potentially fatal situation.

Therefore, it is important that blood types be matched before blood transfusions take place.

He labeled one molecule "A" and the other molecule "B".

Blood Type Facts: There are eight different common blood types, which are determined by the presence or absence of certain antigens, which are substances that can trigger an immune response if they are foreign to the human body.

In an emergency, type O blood can be given because it is most likely to be accepted by all blood types. Finding Out Your Blood Type: It is easy and inexpensive to determine a person's ABO type from a few drops of blood.

A serum containing anti-A antibodies is mixed with some of the blood.

An antigen found in the red blood cells of most people: those who have Rh factor are said to be Rh positive (Rh ), while those who do not are Rh negative (Rh-).