Blood group systems

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Blood group (or blood type) is a term used to clasify blood based on the presence or absence of a specific antigen on red blood cells surface. According to the International Society of Blood Transfusion, there are about 30 human blood group systems recognized so far[1].

Contents

ABO blood group system

The most common blood group system being used nowadays is ABO blood group system. In this system, there are 4 classification of blood types. They are group A, B, AB and O. These groups are classified according to the presence or absence of ABO antigen.


'''Phenotype'''
A
B
AB
O
'''Genotype'''
AA or AO
BB or BO
AB
OO


Rh blood group system

Rh blood group system is the second most important system in determining blood groups. It is based on the presence or absence of D antigen on the red blood cells surface.

See also

References

  1. http://ibgrl.blood.co.uk/isbt%20pages/isbt%20terminology%20pages/table%20of%20blood%20group%20systems.htm, Table of blood group systems, ISBT (August 2008). Retrieved on 15 November 2010.

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