The ABO System is a system of 4 basic types into which human blood may be classified according to the presence or absence of particular antigens:
- A - Blood group A has A antigens in its red blood cells and anti-B antibodies in its plasma;
- B - Blood group B has B antigens and anti-A antibodies in its plasma;
- O - Blood group O blood has no antigens but both anti-A and anti-B antibodies
- AB - Blood group AB has both A and B antigens but no antibodies, as it would destroy itself.
This supporting information is also known by these names:
|fullname||ABO Blood Group System|