Multiple choice

In lungs, air is separated from venous blood by:

  1. squamous epithelium and tunica external of blood vessel

  2. squamous epithelium and endothelium of blood vessel

  3. transitional epithelium and tunica media of blood vessel

  4. columnar epithelium and three layered wall of blood vessel

  5. columnal epithelium and transitional epithelium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Squamous epithelium and endothelium lining of blood vessel help to separate the air from the venous blood in lungs.

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