What are the components of blood and mention thier functions?
Blood have three components named Plasma, RBC, WBC and Platelets. (a) Plasma: acts as a vehicle to carry many substances like glucose, fats, and proteins, enzymes, and hormones etc., in addition to the blood cells. (b) Red Cells: carry oxygen from lungs to various body tissues and take back carbon dioxide from the cells and tissues to be thrown out of body in the form of exhaled air. (c) White cells: mainly act as body scavengers and guards. They help in the immune system of the body and act as defence forces of the body killing the bacteria or any other organisms entering the body. (d) Platelets: help in the clotting and coagulation of blood. We have experienced in our life that whenever we get injured the bleeding stops after a few minutes. This is brought about by a mechanism called clotting of blood in which platelets plays a very vital role.
