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Antibodies - Definition



Definition


An antibody is a protein essential for the immune system. There are several billion of them in the human body and they are capable of recognizing foreign substances in the body by uniting themselves with these substances using receptors called antigens. In this way the bacteria, virus, fungus, venom, or cancerous cells are identified as unwanted elements in the blood stream. Antibodies then immobilize these elements and organize the defense of the body by activating a specific immune system reaction, by recruiting cells that will fight against the unwanted development of these substances.
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