Breathing and Exchange of GasesHard

Question

In lungs, air is separated from venous blood by

Options

A.Squamous epithelium + tunica externa of blood vessel
B.Squamous epithelium + endothelium of blood vessel
C.Transitional epithelium + tunica media of blood vessel
D.Columnar epithelium + 3 layered wall of blood vessel

Solution

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