Question

which area of the trachea lacks cartilage?
a. anterior
b. lateral
c. medial
d. posterior

Explanation:

The trachea has C - shaped cartilage rings. The open part of these C - shaped rings (where cartilage is lacking) is located at the posterior side. This allows the esophagus (which is posterior to the trachea) to expand during swallowing.

Answer:

D. Posterior