What are the three main types of blood vessels in the body? (AS1)

a. There are three major types of blood vessels.

b. The arteries, which carry the blood away from the heart, except pulmonary artery.

c. The capillaries, which very thin and provides the site for exchange of water and chemicals between the blood and the tissues.

d. The veins, which carry blood from the capillaries back to the heart.