A) squamous ciliated
B) columnar ciliated
C) columnar nonciliated
D) squamous nonciliated
Correct Answer: B
Solution :
Alveoli is highly vascularised with an internal lining of very thin squamous epithelium which always remain moist by mucus. The epithelial cells at the linar most margins of septa facing lung cavity are columnar and ciliated.
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