Which respiratory structure is supported by rings of cartilage?
A) trachea
B) alveolus
C) bronchiole
D) pharynx

C) bronchiole

Explanation:

Rings of cartilage, similar to those of the trachea, support the structure of the bronchi and prevent their collapse. The primary bronchi enter the lungs at the hilum, a concave region where blood vessels, lymphatic vessels, and nerves also enter the lungs. The bronchi continue to branch into bronchial a tree.

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yes? sounds right, but you didn’t ask a question.