What does the trachea connect to the lungs?

The correct answer indicates that the trachea serves as a conduit from the pharynx to the lungs. This is crucial in the respiratory system, as the trachea, commonly called the windpipe, is the primary airway that transports air inhaled through the nose or mouth to the lungs.

Once the air passes through the pharynx, it enters the trachea, which then bifurcates into the left and right bronchi before leading into each lung. The structure of the trachea, reinforced with cartilage rings, keeps the airway open, ensuring efficient airflow during respiration.

Understanding the role of the trachea in this pathway is vital for comprehending how oxygen enters the body and carbon dioxide is expelled, highlighting its importance in maintaining respiratory function. The other options do not accurately describe the anatomical connections relevant to the trachea's function in respiration.