Plz meh will give ! the blood determine a person’s blood in the blood attack foreign blood not compatible with the antigens on the blood.

Antigens and antibodies

Explanation:

Antigens are the proteins that are present on the membrane of the red blood cells. These are responsible for imparting blood to it's type depending upon the type of antigen present like A,B, AB, and O.

Antibodies are specialized proteins produced by the immune system of the body when the immune system rectifies a foreign cell like bacteria, virus and antigens of different blood types. The antibodies attack the blood cells of incompatible type during blood transfusion because it contains the antigens of different blood type.  

The fill the blanks are:

Antigens on the blood determine a person’s blood type. Antibodies in the blood attack foreign blood not compatible with the antigens in the blood.

Antigens determine the blood type of person. Antigens are molecules that stimulate the immune response.

Antibodies are present in the cells that kill the foreign material that attack our body.

Thus, the correct fill the blanks are Antigens and Antibodies.

Learn more about antigen, here:

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