Multiple choice

As compared to arteries, veins have ________.

  1. thinner walls

  2. valves present in them

  3. wide lumen

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The blood vessels that carry blood from different regions of the body towards the heart are called veins. The veins are usually thin walled with wide lumen. There are sets of semilunar valves inside the veins, which regulate the unidirectional flow of the blood. On the other hand arteries are the blood vessels that carry blood from the heart to different regions of the body. They are usually thick walled with narrow lumen.

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