Source: Blood Type image, Public domain: http://en.wikipedia.org/wiki/File:ABO_blood_group_diagram.svg
The blood type O; type O blood contains no surface antigens so there is nothing for the immune system to reject.
The blood type AB; type AB blood contains both A & B surface antigens which means that a person with this blood type won’t have any A or B antibodies in their blood.
The high class term for clumping.
A unique marker on the surface of a cell that can stimulate an immune response.
Specific protein markers that are created by the immune system for binding and reacting to specific antigens.