ASVAB General Science Practice Test 492849

Question 1 of 5
Filtering Air

After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis, responsible for preventing food from entering the airway.

Which part of the respiratory system helps protect against infection?



nasal cavity