Chapter : 3. Transportation
Function of Blood
Function of Blood :
Blood perform the following functions :
Transport of Oxygen and Carbondioxide : Blood transports oxygen from the respiratory surface i.e. lungs, buccal cavity to body tissues and carbon dioxide from tissue to respiratory surface.
Transport of food : Blood transports digested food to different cells of the body.
Transport of waste products : Blood transports the waste products of cells and organs to the kidneys, lungs, skin and intestine, so that they may be eliminated.
Chemical coordination : Hormones produced by endocrine glands are distributed to the vital tissues by the blood.
Defence against infection : When bacteria or any other disease causing pathogen enters the body. It is distroyed by WBCs (one type of WBCs; called lymphocytes produce Antibodies against specific pathogen) and so immunity against the disease is created in the body.
Clotting of blood : To prevent excess bleeding, blood-platelets and some protein form clot so as to prevent further bleeding.
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