What tubes open into the nasopharynx?

The nasopharynx is connected to several anatomical structures through the openings of various tubes. Here are the tubes that open into the nasopharynx:

1. Eustachian Tubes (Pharyngotympanic Tubes): The eustachian tubes connect the middle ear to the nasopharynx on each side. They help equalize air pressure between the middle ear and the external environment, facilitating proper hearing and preventing discomfort.

2. Pharyngeal Openings of Auditory (Eustachian) Tubes: These are the openings of the eustachian tubes on the lateral walls of the nasopharynx.

3. Choanae: The choanae are the posterior openings of the nasal cavities into the nasopharynx. They allow air to pass from the nasal cavities to the nasopharynx and further down into the respiratory tract.

4. Pharyngeal Tonsils (Adenoids): The pharyngeal tonsils, also known as adenoids, are located on the posterior wall of the nasopharynx. They are lymphatic tissues involved in immune responses.

5. Pharyngeal Recesses: The pharyngeal recesses are small depressions on the lateral walls of the nasopharynx, located behind the openings of the eustachian tubes.

These tubes and openings establish connections between the nasopharynx and the nasal cavities, ears, and other structures, allowing for the passage of air, sound, and lymphatic tissue functions.