General comments
As we introduced this new topic last week, we mentioned that the blood circulatory system comprises the blood itself (red cells, white cells, platelets, liquid plasma, dissolved nutrients, waste products), the heart, which pumps the blood throughout the body, and the blood vessels (arteries, veins, and capillaries) through which the blood flows.
The function of the blood is (1) to supply the cells of all the body organs with water, electrolytes, oxygen, nutrients and hormones,
