Today we will discuss about blood groups. Yes, we all have different groups but we don't know why we all have such groups. I will try to tell you that why god created such other types of blood for human kind.
Our individual blood group is determined by our parents at the time of our conception. Blood groups are determined by the presence of antigens ( a substance capable of stimulating an immune response) on the surfaces of the red cells. Although the red blood red cells in different people look the same they are, in fact, dissimilar. They can be divided up into four main groups: A,B,AB and O.
Blood can be transplanted from one person to another by what we call a blood transfusion. It is very important that the blood given matches the person's group, because if the wrong types of blood are mixed together the result can be serious blood clots.
Blood begins to clot as soon as it is exposed to the air, plugging the wound. White blood cells gather the wound to kill invading microbes, healing wound beneath the scab.
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