ABO System



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.

For further information on the ABO System, see the NHS website at: Blood groups.

Also Known As

This NHS business definition is also known by these names:

Context Alias
Full name ABO Blood Group System

Where Used

Type Link How used
NHS Business Definition ABO System references in description ABO System
Attribute PERSON BLOOD GROUP references in description ABO System
NHS Business Definition Rh System references in description ABO System