Question

what Keeps the membrane of the respiratory tract moist ? a. Mucus and cilia b. A 'c' shaped cartilage rings c. A peebly epidermal surface d. An acidic glands

Answer 1

Answer:

a. Mucus and cilia.

Explanation:

please please follow me....

Answer 2

Answer:

mucus and cilia is your answer as the other options are not related to moisture the tract