NEET PG DENTAL EXAM

Detailed explanation-1: -C-shaped cartilaginous rings reinforces the anterior and lateral sides of the trachea to protect and maintain the airway open. (The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus.)

Detailed explanation-2: -The trachealis muscle connects the open ends of the C-shaped rings of cartilage and contracts during coughing, reducing the size of the lumen of the trachea to increase the air flow rate.

Detailed explanation-3: -C-shaped cartilage rings on its ventral side prevent the collapse or obstruction of the tube (Figure 1A). Smooth muscle on the dorsal side allows for the expansion of the adjacent esophagus during the consumption of food or liquid.

Detailed explanation-4: -Rings of cartilage are present in the trachea to prevent its collapse when the air is not passing through it. The cartilage is a flexible connective tissue, and it supports the trachea while still allowing it to move and flex during breathing.