Pharynx
The membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.
The pharynx is a cone-shaped muscular cavity located at the back of the nose and mouth, extending down towards the esophagus and larynx. It serves as a passage for both food and air, as it connects the oral cavity and nasal cavity with the digestive and respiratory systems.
There are three sections of the pharynx: the nasopharynx, the oropharynx, and the laryngopharynx. The nasopharynx is the uppermost part of the pharynx and connects with the nasal cavity. The oropharynx is located just behind the mouth and is responsible for channeling air and food towards their respective destinations. Finally, the laryngopharynx is the lowermost part, connecting with the larynx and esophagus.
The pharynx plays an important role in the body’s immune system, as it contains the adenoids and tonsils, which serve as filters to trap and destroy invading microorganisms. When an individual breathes in, the trapped particles in the nasal and oral cavities are brought to the pharynx where they are removed.
The pharynx is also involved in the process of swallowing. As food and liquids are pushed towards the back of the mouth, the muscles in the pharynx contract to move the material towards the esophagus and stomach.
Overall, the pharynx is a highly important structure in the body, serving both respiratory and digestive functions, as well as playing a key role in the immune system.
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