Which of the following maintains the patency (openness) of the trachea? a. surface tension of water b. surfactant production c. C-shaped cartilage rings d. pseudostratified ciliated epithelium

The correct option is C) C-shaped cartilage rings

Explanation:

The trachea is commonly known as the wind-pipe. The trachea can be described as about a 4 inch long passage from which the air travels into the bronchi and lungs. The pathway of the trachea is kept open by C - shaped cartilages which are lined all over in the trachea. The C-shaped cartilages protects as well as maintain the shape of the wind-pipe. The rigidity of the trachea arises from the C-shaped cartilages.