Organ rejection
From Wikipedia, the free encyclopedia
Organ rejection is a process by which the immune system of the recipient of a transplant attacks the transplanted organ. This is because a normal healthy human immune system can distinguish foreign tissues and attempts to destroy them, just as it attempts to destroy infective organisms such as bacteria and viruses. also see Growing new organs of http://www.films.com/id/203/Spare_Parts_Growing_Human_Organs.htm its a nice video that talks about organ rejection and cloning organs.
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