Question

Inside the lungs are sac-like objects called ______.

A. pleura


B. bronchioles


C. alveoli


D. mediastinum

Answer 1

Alveoli are referred to as “sac-like”

because they look like small sacs on the end of the bronchioles. The alveoli exchange oxygen and carbon dioxide.

(Note: alveolus is singular; alveoli is plural.)

Answer 2

The answer is C. alveoli :)

Hope this helps!