Blood is made up of red blood cells, white blood cells, platelets, and plasma. Markers called antigens are found on the surface of red blood cells, and differences in these markers classify various ...

A blood type is classified by the presence or absence of antibodies and certain antigens on the surface of the red blood cells (RBCs). There are four distinct blood types; A, B, AB and O. Transfusion ...

Knowing their blood type can help people better understand their health and be more informed about potential treatments. A person can find out their blood type with a blood test or other methods. The ...