The nasopharynx is the upper part of the pharynx, which is the muscular tube that connects the back of the nose to the top of the esophagus and trachea. It is located behind the nose and above the soft palate. The nasopharynx serves as a passageway for air traveling from the nasal cavity into the throat.

Key features of the nasopharynx include:

Adenoids (Pharyngeal Tonsil): The nasopharynx contains the adenoids, also known as the pharyngeal tonsil. The adenoids are a collection of lymphoid tissue that plays a role in the immune system, particularly in young children.

Eustachian Tube Openings: The openings of the Eustachian tubes are located in the nasopharynx. These tubes connect the middle ear to the nasopharynx and help equalize air pressure in the ears.

Posterior Nasal Aperture: The nasopharynx communicates with the nasal cavity through the posterior nasal aperture, also known as the choanae.

Soft Palate: The nasopharynx is located above the soft palate, which is the flexible part at the back of the roof of the mouth.

Conditions related to the nasopharynx may include infections, such as adenoiditis, and the presence of masses or tumors. Imaging studies, such as MRI or CT scans, are often used to evaluate the nasopharynx and surrounding structures when there are concerns about abnormalities. Additionally, endoscopy may be used for a direct visualization of the nasopharynx during diagnostic procedures.