A) squamous epithelium + tunica externa of blood vessel
B) squamous epithelium + endothelium of blood vessel
C) transitional epithelium + tunica medica of blood vessel
D) columnar epithelium + 3 layered wall of blood vessel
Correct Answer: B
Solution :
In lungs, air is separated from venous bloody the presence of squamous epithelium and endothelium of blood vessel.
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