Has only B antigen on red cells (and A antibody in the plasma) Has only A antigen on red cells (and B antibody in the plasma) There are 4 major blood groups determined by the presence or absence of two antigens (A and B) on the surface of red blood cells: Since some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching. There are eight different common blood types, which are determined by the presence or absence of certain antigens, which are substances that can trigger an immune response if they are foreign to the human body.
Blood Type O - If the red blood cell has neither "A" or "B" molecule. 
Blood Type AB - If the red blood cell has a mixture of both "A" and "B" molecules. Blood Type B - If the red blood cell has only "B" molecules on it. Blood Type A - If the red blood cell has only "A" molecules on it. The frequencies of the ABO and Rh blood types vary from population to population. #Blood typ o donor series
A series of related blood types constitutes a blood group system, such as the Rh or ABO system.
With regard to transfusions of packed red blood cells, individuals with type O Rh D negative blood are often called universal donors, and those with type AB Rh D positive blood are called universal recipients.įind out other interesting blood facts in our list of fascinating and amazing human body facts.Ī blood type (also called a blood group) is defined as the classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). A popular belief in Japan is that a person's ABO blood type is predictive of their personality, character, and compatibility with others. A total of 35 human blood group systems are now recognized by the International Society of Blood Transfusion (ISBT). 
Many pregnant women carry a fetus with a blood type which is different from their own, which is not a problem. Almost half (48%) of the UK population has blood group O, making this the most common blood group. Your body carries around four to six liters (7 to 10.5 pints) of blood. Receiving blood from the wrong ABO group can be life threatening. About 5 million Americans need blood transfusions every year. Some Quick Facts Regarding Blood Types/Groups World Average Human Life Span Expectancy by Country. Home Urinalysis Test Strip Color Chart and Explanations.
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