donoriryhmät
Donoriryhmät, or blood types, are classifications of human blood based on the presence or absence of specific antigens on the surface of red blood cells. The most common system used to classify blood types is the ABO system, which is based on the presence of A and B antigens on the red blood cells. There are four main blood types in this system: A, B, AB, and O. Individuals with type A blood have A antigens on their red blood cells and B antibodies in their plasma, while those with type B blood have B antigens and A antibodies. Type AB blood has both A and B antigens but no corresponding antibodies, and type O blood has neither A nor B antigens but both A and B antibodies.
In addition to the ABO system, there is the Rh system, which is based on the presence
Blood type is determined by genetic inheritance, with the ABO and Rh genes located on chromosome 9.
Blood type is important in medicine, particularly in blood transfusions and organ transplants. Compatibility between donor