题目内容

What are the three divisions of the pharynx?

A. nasopharynx
B. oropharynx
C. hypopharynx
D. all are right

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What part of the pharynx serves as the common passageway for air and food?

A. oropharynx
B. laryngopharynx
C. pharynx
D. nasopharynx

The _____, a flap of cartilage acting like a lid over the larynx, lies over the entrance to the larynx.

A. uvula
B. epiglottis
C. tonsils
D. vocal cord

The trachea is kept open by 16-20 C-shaped rings of cartilage separated by _____

A. blood tissue
B. muscle tissue
C. fibrous connective tissue
D. nervous tissue

At the end of the bronchioles are clusters of air sacs called______

A. alveolus
B. bronchiole
C. capillary
D. alveoli

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