Where does the Eustachian tube end?

The Eustachian tube, also known as the pharyngotympanic tube, serves a critical role in equalizing air pressure in the middle ear with that of the atmosphere. Its anatomical journey begins in the middle ear and connects to the nasopharynx, which is the space behind the nose and above the throat. This connection allows for drainage of fluids and contributes to proper ventilation of the middle ear.

The nasopharynx is the terminal point of the Eustachian tube. When we swallow or yawn, the tube opens, enabling air to flow into the middle ear, thus balancing pressure. This is essential for normal hearing and functioning of the auditory system.

While the other choices refer to areas related to hearing, they do not represent the endpoint of the Eustachian tube. The middle ear is where the tube begins, the inner ear is responsible for balance and hearing beyond the middle ear, and the auditory canal leads sound to the eardrum but does not serve as the conclusion of the Eustachian tube's pathway.