Breathing and Exchange of Gases Question 16

16. The alveolar epithelium in the lungs is

[1990]

(a) nonciliated columnar

(b) nonciliated squamous

(c) ciliated columnar

(d) ciliated squamous

Show Answer

Answer : b

Hints & Solution

(b) The very thin alveolar wall (about 0.0001 $mm$ ) is composed of moist, non-ciliated, squamous epithelial cells.