Which of the following is not an accessory structure of the respiratory system?
A) Oral cavity
B) Trachea
C) Rib cage
D) Diaphragm

Question

Quizplus · Accepted Answer

The trachea is a part of the airway and not considered an accessory structure of the respiratory system. Accessory structures assist in breathing but are not directly part of the airway; the trachea, however, is a central component of the airway, conducting air to the lungs.

Which of the Following Is Not an Accessory Structure of the Respiratory