Question

why artery does not contain any valve except pulmonary artery ?

Answer 1

Rather than requiring valves to regulate blood flow, arteries require flexible walls that can withstand great pressure to accommodate the flow. The constant motion of blood in arteries ensures that blood is always pushed forward; it does not flow backwards because of the blood behind it.

.

.

hope it helps

#answerwithquality

#bal

Answer 2

Answer:

All blood vessels leading from the heart are called arteries. ... This is true for all arteries except the pulmonary artery, which carries deoxygenated blood back from the lungs. Arteries have thick, elastic, muscular walls and do not contain valves, largely because most blood flows downward with the pull of gravity.