Is air passage through the pharynx and larynx before entering the trachea true?

The statement that air passes through the pharynx and larynx before entering the trachea is indeed true. The pharynx serves as a common passageway for both air and food; it connects the nasal cavity to the larynx, which is involved in air passage as well as vocalization. The larynx itself acts as a gateway that directs air toward the trachea while also having protective functions to prevent food and liquids from entering the airway.

This sequence is a fundamental aspect of the respiratory anatomy in horses, as in most mammals, and it is essential for the proper functioning of the upper respiratory system. Understanding this pathway is important for evaluating respiratory health in horses and can aid in diagnosing any issues that may arise within these structures.