Question

What is the primary function of the upper respiratory system? to move air toward the lungs while warming, moistening, and filtering it to diffuse oxygen and carbon dioxide in and out of cells to absorb and break down nutrients after they are consumed to pad the head with air pockets to protect against brain trauma

Answer 1

move air towards the lungs and warm, moisten, filter

Step-by-step explanation:

the upper respiratory system incldues your mouth, nose, trachea, and a portion of your lungs