When you are born you are given one out of the four different types of blood. You are either given:
- Type A: Type A blood has B antigens in the blood plasma and A antigens on surface of the red blood cells.
- Type B: Type B blood is the opposite of type A blood for it has A antigens in the blood plasma and B antigens on the surface of the red blood cells.
- Type AB: Type AB blood has both A and B antigens on the surface of the red blood cells but has neither A or B antigens in the blood plasma.
- Type O: Type O blood is the opposite of type AB blood because it has neither A or B antigens on the surface the red blood cells but has both A and B antigens in the blood plasma.
For more information see: http://nobelprize.org/educational_games/medicine/landsteiner/readmore.html
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