The tissue that keeps the trachea an open airway is:
A)smooth muscle
B)cartilage
C)bone
D)ciliated epithelium

Question

Quizplus · Accepted Answer

The trachea is kept open by C-shaped rings of cartilage that also protect it from collapsing when pressure is applied. The smooth muscle is located between the cartilage rings and is responsible for contracting to narrow the trachea during swallowing or coughing. C and D are not correct because bone is not involved in the trachea and ciliated epithelium is responsible for moving mucus and debris out of the trachea, but it does not keep the airway open.

The Tissue That Keeps the Trachea an Open Airway Is