What is the correct order of air entering the lungs?

Air enters the lungs through a specific pathway that involves several anatomical structures of the respiratory system. The correct sequence, which starts from the environment and proceeds to the lungs, includes the larynx, trachea, and then bronchi.

Initially, air is inhaled through the nasal cavity or mouth, which leads to the pharynx. From the pharynx, the air passes into the larynx, also known as the voice box, where it is directed downward. The larynx serves as a gateway to the trachea, which is the main airway that connects the larynx to the lungs.

After the trachea, air moves into the bronchi, which are the two primary branches that lead into each lung. Each bronchus further divides into smaller bronchioles, ultimately leading to the alveoli, where gas exchange occurs.

Understanding this anatomical pathway is essential for comprehending how air flows into the lungs and how various conditions might affect respiration. By following the sequence of larynx, trachea, and bronchi, one can accurately trace the route that air takes to reach the sites of gas exchange in the lungs.