Question

Veins have a much lower blood pressure than arteries. Which of these prevents backflow of blood in veins?

Answer 1

veins have mascular valves which prevents backflow of blood in veins.

Answer 2

Answer:

The veins have a much lower blood pressure than the arteries because the arteries carry oxygenated blood that is pumped with force by the heart, this pumping creates a pressure in the oxygenated blood and this pressure prevents the ‘back flow of blood’.

Explanation:

Whereas in a vein, which carries deoxygenated blood no organ pumps the blood and therefore their pressure is low, hence the veins are equipped with ‘valves’ to prevent the back flow of blood.