Carina is the structure that splits the trachea into left and right main bronchi.

Carina is the structure that splits the trachea into left and right main bronchi.

• A. Carina
• B. Epiglottis
• C. Alveoli
• D. Bronchioles

Answer: (A)

The main concept here is the landmark where the airway divides. The carina is the cartilaginous ridge at the bifurcation of the trachea into the left and right main bronchi. It sits at the lower end of the trachea and marks the split into the two primary airways, which is why it’s the correct term for “the structure that splits the trachea into left and right main bronchi.” It also plays a role in sensing irritants and triggering coughing. Epiglottis is the flap at the top of the larynx that protects the airway during swallowing; alveoli are the tiny air sacs where gas exchange occurs; bronchioles are the smaller airways leading to the alveoli.

The main concept here is the landmark where the airway divides. The carina is the cartilaginous ridge at the bifurcation of the trachea into the left and right main bronchi. It sits at the lower end of the trachea and marks the split into the two primary airways, which is why it’s the correct term for “the structure that splits the trachea into left and right main bronchi.” It also plays a role in sensing irritants and triggering coughing.

Epiglottis is the flap at the top of the larynx that protects the airway during swallowing; alveoli are the tiny air sacs where gas exchange occurs; bronchioles are the smaller airways leading to the alveoli.