The trachea divides into the right and left main bronchi at which structure?

• A. Larynx
• B. Carina
• C. Pharynx
• D. Esophagus

Answer: (B)

The split of the trachea into the right and left main bronchi occurs at a structure called the carina. The carina is an internal ridge at the point where the trachea divides, typically around the level of the sternal angle (about T4–T5). It’s a vital landmark in airway anatomy and also a highly sensitive area that triggers the cough reflex if irritated.

The other structures listed aren’t involved in the division. The larynx sits above the trachea as the gateway for air and voice production, the pharynx is a common path for air and food above the larynx, and the esophagus lies posterior to the trachea and does not participate in airway branching.