Anti-A, for example, targets red cells of Group A or AB. They assault and quickly kill red cells bearing the antigen. The majority of these naturally occurring antibodies are IgM immunoglobulins. Healthy people develop red cell antibodies against A or B antigens that are not expressed in their cells as early as childhood. Four ABO blood types are defined by whether an individual’s red cells carry the A antigen, the B antigen, both A and B antigens, or neither. The ABO blood group system is the most critical of all blood group systems. Blood types must also be compatible for organ transplants to occur. Understanding blood types enables healthcare expert to safely transfuse donated blood from one person to another during a blood transfusion. If you have this protein, your blood type is positive (+). They are also looking for a protein known as the Rh factor. Blood bank professionals assess your blood type based on whether your red blood cells contain antigen A or B. The four major blood types are A, B, AB, and O. A, B, AB, and O are blood types.Ī blood type is a classification system that allows healthcare providers to determine whether your blood is compatible or incompatible with someone else’s blood. Donors and recipients with compatible blood types are required for blood transfusions and organ transplants. Blood types categorise blood so that healthcare providers can assess whether one person’s blood is compatible with the blood of another. Table Of ContentsĪlthough all blood performs the same function, not all blood is the same. Researchers have found over 300 minor blood groups, with new antigens being discovered continuously. They make up the eight major blood groupings. The ABO system and the Rh system are the two basic methods for classifying blood groups. The plasma contains red blood cells, which carry oxygen, white cells, which are part of the immune system, and platelets, which are clotting cells. Plasma constitutes the majority of your blood. The blood transports oxygen and nutrients to all cells in the body, as well as waste products (such as carbon dioxide) for elimination. The circulatory system comprises the heart, blood arteries, and blood itself.

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