Question

1)capillaries are important.
2) Arteries do not have valves.
3) the walls of Arteries are thicker than the veins
please say the answers for all the questions​

Answer 1

Answer:

Explanation:

1)the purpose of capillaries is to play the central role in the circulation, delivering oxygen in the blood to the tissues, and picking up carbon dioxide to be eliminated. They are also the place where nutrients are delivered to feed all of the cells of the body.

2)Arteries carry oxygenated blood away from the heart. ... (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.

3)Arteries experience a pressure wave as blood is pumped from the heart. This can be felt as a "pulse." Because of this pressure the walls of arteries are much thicker than those of veins.