Question

epithelium of nasal mucosa
what gets trapped by cilia and mucus in the respiratory tract?
small pieces of food
liquids that you drink
oxygen and carbon dioxide

Explanation:

The cilia and mucus in the respiratory - tract form a protective barrier. They trap dust, dirt, bacteria, and other foreign substances to prevent them from entering deeper into the lungs, rather than small food pieces, drinking liquids, or oxygen and carbon - dioxide (which are involved in gas exchange).

Answer:

None of the above options are correct. Dust, dirt, bacteria, and other foreign particles are trapped by cilia and mucus in the respiratory tract.