Question

final review
what gets trapped by cilia and mucus in the respiratory tract?
small pieces of food
liquids that you drink
oxygen and carbon dioxide
large airborne particles

Explanation:

The cilia and mucus in the respiratory tract act as a defense mechanism. They trap large airborne particles like dust, pollen, and other foreign substances to prevent them from entering deeper into the lungs. Small pieces of food and liquids are not their target as they are related to the digestive - not the respiratory - process. Oxygen and carbon dioxide are gases that are involved in gas - exchange and are not trapped by cilia and mucus.

Answer:

D. large airborne particles