Multiple choice

As compared to artery, a vein has _______.

  1. thinner wall

  2. presence of valves

  3. wide lumen

  4. all of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Veins have thinner muscular walls compared to arteries because they carry blood at lower pressure. They contain valves to prevent the backflow of blood and possess a wider lumen to facilitate easier flow.