why persons of blood group O are universal donors?
Answers
There are over 20 blood type groups, the most prominent of which is the ABO group. Blood type is determined by the presence of antigens on the cell membrane. In the ABO grouping system, the RBC cell membrane can have antigen A, B, neither, or both. People with blood type A would have an A antigen. People with blood type B would have a B antigen. People with AB blood have both antigens, and people with blood type O have neither antigen.
The immune system develops antibodies for the antigens it lacks. People with blood type A have an antibody against blood type B, and vice versa. People with blood type AB have no antibodies, so they can accept any type of blood. People with blood type O have antibodies for types A and B.
Blood type O is the universal donor because it has no A or B antigens on its RBC membranes. This means that people with blood types A, B, and AB have no antibodies to reject type O. Blood type AB is the universal recipient because it contains no antibodies, and therefore will not reject any of the other blood types regardless of its antigens.
because the persons of blood group O can donate blood to all the other blood groups