a) Plasma
This is the liquid part of the blood and most of it is water. Plasma of the blood of human beings and other mammals is pale-yellow. It is made up of the following: Hormones, Urea, Salts, Food substance, Digested food, Carbon dioxide.
Functions of Plasma:
To transport red blood cell, white blood cells, digested food, hormones and waste products to all around the body.
b) Red Blood Cells They contain red pigments giving them the red color. They are disc-shaped and are smaller than the white blood cells because of their red pigments, they give the blood color.
Functions of Red Blood Cells:
Main function of the red blood cell is to carry oxygen from the lungs to all other parts of the body. In them is chemical called hemoglobin which carries oxygen within the red blood cells. Oxygenated blood is the blood rich in oxygen and is bright. Blood with little or without oxygen is dull red and is said to be deoxygenated blood.
c) White Blood Cells They do not have a fixed shape since they keep on changing their shapes. They have no color but do have a dark part at the centre called nucleus. In size are larger than red blood cells. They are fewer than red blood cells.
Functions:
The main function is protection of body from germs. They move to the attacked body part and fight the germs. They change the shape while fighting the germs and this way are able to engulf and destroy the germs.
d) Platelets These are tiny cell fragments found in the blood. They are smaller than either white or red blood cells.
Functions:
These help in the clotting of the blood. They prevent further loss of the blood from the part that was injured. They help to stop bleeding from cuts and wounds.
Mutiso answered the question on October 6, 2018 at 18:03