What is the correct pathway of air from the nose to the alveoli?

The pathway of air from the nose to the alveoli involves several anatomical structures that facilitate breathing and gas exchange. Starting at the nose, air is inhaled and passes through the nasal cavity, where it is warmed, moistened, and filtered. From there, it enters the nasopharynx, which is the upper part of the throat behind the nose.

After the nasopharynx, the air continues into the pharynx, a muscular tube that serves as a pathway for air to the larynx, or voice box. The air then moves into the larynx, where it is directed into the trachea, a large airway. The trachea further divides into the right and left bronchi, which lead into the lungs. Inside the lungs, the bronchi divide into smaller bronchioles, eventually reaching the alveoli, the tiny air sacs where gas exchange occurs.

This sequence includes all the necessary structures involved in the passage of air, ensuring that it is adequately prepared for delivery to the alveoli. The comprehensive route provided in this choice illustrates the complete process of air travel from the nasal cavity to the site of gas exchange, which is essential for effective respiration.