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Blood And Its Groups

Updated on October 22, 2011

A car is usually driven by the pumping of petrol by the car's engine. Similarly the process of life is maintained by the pumping of blood by the heart (our engine). This pumping results in blood reaching the nooks and corners of our body, to each and every cell. Remember, there are millions of cells in our body.

The importance of blood pumping can be recognized by the fact that blood is the medium of gaseous exchange and it transports food and enzymes to various cells taking away the waste products.

Blood groups

There are four different blood types or groups namely O, A, B and AB. The difference of blood groups lies on two antigens, namely antigen A and antigen B. Those having antigen A have group A, those having antigen B have group B, those having both the antigens have group AB and those having no antigens come under group O.

The prevalence of different blood types among white people, is as follows:

O 47%

A 41%

B 9%

AB 3%

These percentages show that the O and A gene occur frequently, whereas gene B is infrequent. On the basis of the presence of Rh antigen, the blood groups are further divided into positive or negative. If Rh antigen is present then the blood group is positive or vice versa.

Importance of blood groups

During the transfusion of blood only those patients survive who receive the blood of their own group, an A + would only receive A +. A mismatched transfusion usually results in rejection by the body leading to the death as the blood does not accept any foreign groups. There are certain bodies known as antibodies in the blood, which would cling to the blood cells (if of foreign or different group) and may cause blockage in veins and arteries.

So, better find out your blood group and remember it for any sort of emergency.

Fact to remember

Blood group AB is known as ‘universal acceptor' because it can receive blood from any other group during transfusion. Blood group O can donate blood to any other group so it is known as a ‘universal donor'. So if you have blood group O or AB then you have edge over the others.

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      6 years ago

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      9 years ago

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