ABO blood grouping system

		According to the AB0 blood group system there are four different kinds of blood groups: A, B, AB or 0 (null).
		Blood group A If you belong to t he blood group A, you have A antigens on the surface of your red blood cells and B antibodies in your blood plasma.
		Blo od group B If you belong to the blood group B, you have B antigens on the surface of your red blood cells and A antibodies in your blood plasma.
		Blood group AB If you belong to the blood group AB, you have both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma.
		Blood group O If you belong to the blood group 0 (null), you have neither A or B antigens on the surface of your red blood cells but you have both A and B antibodies in your blood plasma.