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Question: Answered & Verified by Expert

A vein possesses a large lumen because

BiologyBody Fluids and CirculationNEET
Options:
  • A

    Tunica media and tunica externa form a single coat
  • B
    Tunica interna and tunica media form a single coat
  • C

    Tunica interna, tunica media and tunica externa are thin
  • D

    Tunica media is a thin coat
Solution:
1201 Upvotes Verified Answer
The correct answer is:

Tunica media is a thin coat
The wall of blood vessels is made up of tunica externa, tunica media, and tunica interna. Veins have a larger lumen when compared to the arteries. The middle layer i.e., tunica media is a dense network of circular, smooth muscles with elastic fibres found in arteries. It is comparatively very thin in veins.

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