<span>There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart</span>
Answer:
it regulates blood volume and blood pressure.
Explanation:
Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and on to the rest of the plant.
As the tissue heals, new scar tissue is created inside of the damaged heart tissue, thus it doesn't pump as well as healthy heart tissue