The Nose, Nasal Cavity, and Pharynx Issuses

The nose is the primary passageway for air entering the respiratory system. Air normally enters through the paired external nares, or nostrils, which open into the nasal cavity . The vestibule is the space contained within the flexible tissues of the nose The nasal septum divides the nasal cavity into left and right portions. The superior , middle , and inferior nasal conchae project toward the nasal septum from the lateral walls of the nasal cavity.

A bony hard palate , made up of portions of the maxillary and palatine bones, forms the floor of the nasal cavity and separates it from the oral cavity.

A fleshy soft palate extends posterior to the hard palate, marking the boundary between the superior nasopharynx and the rest of the pharynx. The nasal cavity opens into the nasopharynx through a connection known as the internal nares. As cool, dry air passes inward over the exposed surfaces of the nasal cavity, the warm epithelium radiates heat and the water in the mucus evaporates.

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Air moving from your nasal cavity to your lungs has been heated almost to body temperature, and it is nearly saturated with water vapor. This mechanism protects more delicate respiratory surfaces from chilling or drying out–two potentially disastrous events The extensive vascularization of the nasal cavity and the relatively vulnerable position of the nose make a nosebleed, or epistaxis, a fairly common event. The Pharynx is a chamber shared by the digestive and respiratory systems. It extends between the internal nares and the entrances to the larynx and esophagus.

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The pharynx is divided into the nasopharynx, the oropharynx, and the laryngopharynx. The nasopharynx is the superior portion of the pharynx. It is connected to the posterior portion of the nasal cavity through the internal nares and is separated from the oral cavity by the soft palate. The oropharynx extends between the soft palate and the base of the tongue at the level of the hyoid bone. The narrow laryngopharynx, the inferior part of the pharynx, includes that portion of the pharynx between the hyoid bone and the entrance to the larynx and esophagus.

Updated: May 19, 2021
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The Nose, Nasal Cavity, and Pharynx Issuses. (2020, Jun 02). Retrieved from

The Nose, Nasal Cavity, and Pharynx Issuses essay
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