Answered

Which of the following statements about blood vessels is correct?

Select one:

AAll blood vessels contain an inner smooth muscle layer.
BAll blood vessels contain a tunica externa.
CAll blood vessels contain a tunica intima.
DAll blood vessels contain an inner connective tissue layer.

Verified Answer :

yashddsy26

all blood vessel has tunica intima , all the layers are present in artery and vein but capillaries are so thin and only made up.of intima !

so answer is C !

sandlee09

Answer:

b. All blood vessels contain a tunica externa.

Explanation:

Every blood vessel contains a "tunica externa". This is the outer layer of the blood vessel made up of a series of interconnected tissue that provides protection for the blood vessel. There are three types of blood vessels.

  • Arteries
  • Veins
  • Capillaries

All of which have a "tunica externa" but only Arteries and Veins have a "tunica intima". Which is why the answer for this question is B.

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