Question

what tissue is found in the air sacs of the lungs and works best for diffusion?
○ simple squamous
○ simple columnar
○ stratified squamous
○ pseudostratified
○ transitional

Explanation:

Simple squamous epithelium is a single layer of flat cells. It's thin, allowing efficient diffusion. Air sacs (alveoli) of lungs use it for gas exchange. Other options (simple columnar, stratified squamous, pseudostratified, transitional) have structures unsuitable for rapid diffusion.

Answer:

A. simple squamous