The antigens depend on the genes you inherit from your parents. Your blood group varies depending on the tiny molecules called blood group antigens that are present on the surface of your red blood cells or RBCs. The table below includes various blood types. This may also be AB- or AB+ depending on the absence or presence of the Rh antigen on the surface of the RBCs. When both antigens are present, the blood group is called the AB blood type. AB: Some people may have both the antigens, A and B, on the surface of the RBCs.Blood group O can be O- (O negative) or O+ (O positive) depending upon the absence or presence of the Rh antigen on the surface of the RBCs. O: Blood group O means that both antigens A and B are absent from the RBC surface.This can also be either blood group B+ or B- based upon the Rh antigen status. B: People with the B antigen on the RBC surface have blood group B.Likewise, if the Rh antigen is absent the person will be A- (A negative). If a person with blood group A bears Rh antigen on their RBCs, the blood group is called A+ (A positive). Apart from the ABO antigens, there is another important antigen on the RBC surface called the Rh antigen. A: This type of blood group means the RBCs have the antigen called antigen A on their surface.Based on this classification, your blood group maybe These antigens may be grouped in various categories to form a system for blood typing called the ABO system. The red blood cells or RBCs present in the blood carry certain molecules, called antigens, on their surface that determine what blood group you have. Your blood contains various cells and the liquid portion is called the plasma. You must have heard about the terms “blood group” or “ blood type.” If you ever have undergone surgery or been admitted to a hospital for medical conditions, your doctor might have examined your blood for various parameters, such as blood counts and blood type. Blood type determines who you can donate blood to and who you can receive it from.
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