PATHOLOGY

Detailed explanation-1: -Veins have valves to prevent this backflow of blood. Valves ensure that blood flows only in one direction through veins. Therefore, veins have valves, not the arteries.

Detailed explanation-2: -Both heart and veins contain valves. These valves are present to prevent the backflow of blood to their respective chambers. Valves help to ensure that the blood flow occurs in only one direction.

Detailed explanation-3: -However, there are valves on the two arteries exiting the right and left ventricles that stop blood from flowing backward. Aortic and pulmonary valves are typically regarded as heart valves. The aortic valve opens and the mitral valve shuts when the left ventricle contracts, allowing blood to flow into the aorta.