What is the last organ air passes through before entering the lungs?

The last organ air passes through before entering the lungs is the bronchi. The bronchi are the two main passageways that branch off from the trachea, leading directly into the lungs. After air travels down the trachea and passes through the larynx and pharynx, it enters the bronchi, where it is further distributed into the lungs' various lobes.

Understanding the flow of air through these structures is crucial for grasping how the respiratory system functions. The larynx is involved in sound production and protects the trachea against food aspiration, while the pharynx serves as a passageway for air and food before it splits into the esophagus and the trachea. However, once air has passed these structures, it is the bronchi that serve as the final airways leading into the lung tissue itself.