Which of the following is a major distinction between veins and arteries?

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Correct Answer: A. veins have valves
Veins carry blood to the heart, recollecting it from the body. Conversely, arteries carry blood away from the heart to the body. To prevent backflow and to promote the movement against gravity, veins have valves whereas arteries do not. Arteries also have very thick, muscular walls that enable pumping from the heart to the body. Veins are thinner in comparison and are not considered to have to “pump” blood or be under high pressure.
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