Question

which type of epithelium is in the lining of the lung air sacs?
o transitional
o simple columnar
o pseudostratified columnar
o simple squamous

Explanation:

Simple squamous epithelium is thin and flat, facilitating efficient gas - exchange which is essential for the function of lung air sacs (alveoli). Other types like transitional, simple columnar, and pseudostratified columnar are not suited for this rapid gas - transfer function.

Answer:

simple squamous