The blood transfers the materials to all the body cells, where the red blood cells carry oxygen and carbon dioxide, and plasma transports the food, vitamins, salts, and harmful wastes.
The blood protects the body, where the white blood cells attack the microbes that cause diseases to the human, The blood platelets help in healing wounds, and the blood keepsthe temperatureof the body constant.
The plasma is a yellow watery fluid in which all the blood components are suspended. It carries the needed food substances to the body cells, and it carries the harmful wastes that formed in the cells to get rid of them, The blood is fluid due to the presence of plasma which is a watery fluid.
The blood platelets
The blood structure
The blood platelets are the small cell fragments. It helps in the coagulation of theblood(the formation of the blood clot), So they help in healing the wounds.
When the body is wounded and the blood is exposed to the air, the platelets stick to prevent the bleeding and they heal the wounds.