Question

what type of tissue forms the walls of the alveoli?
multiple choice
areolar connective tissue
ciliated columnar epithelium
simple squamous epithelium
stratified squamous epithelium

Explanation:

• Areolar connective tissue is more about binding and cushioning, not alveolar walls.
• Ciliated columnar epithelium is for moving substances (like in respiratory tract parts above alveoli), not alveolar walls.
• Stratified squamous epithelium is for protection in areas like skin, not alveolar gas - exchange - focused walls.
• Simple squamous epithelium has thin cells which facilitate efficient gas exchange (oxygen and carbon dioxide diffusion) across the alveolar walls.

Answer:

Simple squamous epithelium