The nasal cavity opens into the nasopharynx at the
Microorganisms removed from incoming air by the mucus of the respiratory tract are ultimately exposed to and destroyed by
A)toxins in the mucus.
C)stomach acids and enzymes.
D)a lack of nutrients.
The portion of the nasal cavity contained within the flexible tissues of the nose is the
Which of the following forms much of the anterior and lateral surfaces of the larynx, and often contains an "Adam's apple"?