The epithilium of alveoli is:
Correct answer: B. Squamous epithilum
- A. Cillated epithilium
- B. Squamous epithilum
- C. Cuboidal epithilium
- D. Columnar epithilium
Explanation
The alveolus is composed of alveolar epithelial type 1 cells, alveolar epithelial type 2 cells and capillary cells. Type 1 cells are large, squamous epithelial cells that cover ~95% of the alveolar surface area. Type 2 cells produce surfactant and play a role in maintenance of lung fluid balance.
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