Isthmus of the fauces

Isthmus of the fauces

The Isthmus of the fauces is an anatomical structure forming part of the human digestive system. It is the narrow opening that connects the mouth and the pharynx, allowing for the passage of food, drink, and air.

Anatomy

The Isthmus of the fauces is bordered superiorly by the soft palate and inferiorly by the posterior part of the tongue. Laterally, it is bounded by the palatoglossal arch on each side. The palatoglossal arches are formed by the palatoglossus muscle, which is a part of the muscles of the tongue.

Function

The primary function of the Isthmus of the fauces is to act as a gateway that allows the passage of food and drink from the mouth to the pharynx. It also plays a role in the process of respiration, allowing air to pass from the mouth to the respiratory tract.

Clinical significance

Due to its location, the Isthmus of the fauces can be affected by various medical conditions. These include tonsillitis, pharyngitis, and oral cancer. In cases of severe tonsillitis, the inflammation can cause the Isthmus of the fauces to become narrower, which can lead to difficulty in swallowing.

See also

• Oral cavity
• Pharynx
• Tonsils