Which structure serves as the connection between the lungs and the throat?

The trachea functions as the primary passageway that connects the throat, or pharynx, to the lungs. After air is inhaled through the nose or mouth, it travels through the pharynx and then enters the trachea. The trachea is a rigid, tube-like structure reinforced with cartilage rings, which helps maintain its open shape, allowing air to flow freely towards the lungs. As air passes through the trachea, it eventually divides into two bronchi, which lead into each lung. This direct connection is crucial for effective respiration, enabling the exchange of gases between the air and the bloodstream.

The other structures listed serve different functions: the bronchi are the branches that lead from the trachea into the lungs, the pharynx is involved in both respiration and digestion but does not connect directly to the lungs, and the larynx is positioned above the trachea and is primarily responsible for sound production and protecting the airway during swallowing.