ABO and Rh: Blood type is determined by the antigens found on the surface of red blood cells. There are many groups of antigen systems, the two more important are ABO and rh. A person could be typed as a, b, ab or o and either rh positive or negative. The most common is o positive, the least common is ab negative.
Answered 1/12/2015
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Blood type: Refers to the proteins present or not present on the surface of red blood cells. The types are a, b, ab and o.
Answered 4/13/2014
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