What are the Functions of Blood in Human Body

What are the Functions of Blood in Human Body

Functions of Blood :
Blood perform the following functions :

  1. 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.
  2. Transport of food :
    Blood transports digested food to different cells of the body.
  3. 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.
  4. Chemical coordination :
    Hormones produced by endocrine glands are distributed to the vital tissues by the blood.
  5. 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.
  6. Clotting of blood :
    To prevent excess bleeding, blood-platelets and some protein form clot so as to prevent further bleeding.
  7. Water balance :
    Blood maintains body temperature constant and distributes and exchanges water between cytoplasm of cells.
  8. Temperature regulation :
    Heat produced by deeper tissues is taken to the body surface, so that it may be given out and thus body temperature is maintained.
  9. Maintainance of body pH :
    In RBC, some carbon dioxide combines with water to form carbonic acid (H2CO3) that is disossociated into Hand HCO3. These ions combines with ions of plasma to maintain a constant pH.
  10. Maintenance of pressure :
    Arteries produce a proper pressure of blood that helps to balance the atmospheric pressure.
  11. Blood Clotting : 
    Flow Chart Showing Clotting of Blood
    What are the Functions of Blood in Human Body 1