What is the last single airway passage from the outside environment prior to branching between two major bronchi?

Question

Quizplus · Accepted Answer

The trachea, also known as the windpipe, is the last single airway passage from the outside environment prior to branching between the two major bronchi. It extends from the larynx to the bronchi and is responsible for carrying air to and from the lungs. The pharynx, throat, and alveoli are all involved in the respiratory system, but they are not the last single airway passage prior to the branching of the bronchi.

What Is the Last Single Airway Passage from the Outside