Which blood vessel has valves to prevent backflow and carries blood toward the heart?

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Multiple Choice

Which blood vessel has valves to prevent backflow and carries blood toward the heart?

Explanation:
Veins are the vessels that return blood to the heart and have one-way valves that prevent backflow. This setup is essential because blood in the venous system is under lower pressure and often needs to travel against gravity, especially in the legs; the valves ensure it keeps moving toward the heart. Capillaries are tiny exchange vessels and don’t have valves. Arteries carry blood away from the heart, and the big major artery shown here is the aorta; along their length arteries generally don’t have valves. So the feature of having valves to prevent backflow and carrying blood toward the heart is characteristic of veins.

Veins are the vessels that return blood to the heart and have one-way valves that prevent backflow. This setup is essential because blood in the venous system is under lower pressure and often needs to travel against gravity, especially in the legs; the valves ensure it keeps moving toward the heart. Capillaries are tiny exchange vessels and don’t have valves. Arteries carry blood away from the heart, and the big major artery shown here is the aorta; along their length arteries generally don’t have valves. So the feature of having valves to prevent backflow and carrying blood toward the heart is characteristic of veins.

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