Pyriform sinus
Pyriform Sinus
Pyriform Sinus (pronounced: pie-rif-form si-nus) is a part of the pharynx that plays a crucial role in the human respiratory system and digestive system.
Etymology
The term "Pyriform Sinus" is derived from the Latin words "pyrum" meaning pear, and "forma" meaning shape, referring to its pear-like shape. "Sinus" is a Latin term meaning cavity or hollow space.
Definition
The Pyriform Sinus is a pear-shaped recess or cavity located on either side of the laryngeal orifice, the opening that connects the pharynx and the larynx. It is part of the hypopharynx, the bottom part of the pharynx, and is lined with mucous membrane.
Function
The primary function of the Pyriform Sinus is to guide the food and liquid we swallow into the esophagus, and prevent it from entering the trachea, thus playing a vital role in the process of swallowing.
Related Terms
- Pharynx: The part of the throat situated behind the mouth and nasal cavity, and above the esophagus and trachea.
- Larynx: Also known as the voice box, it is involved in breathing, producing sound, and protecting the trachea against food aspiration.
- Hypopharynx: The bottom part of the pharynx, situated below the oropharynx and above the esophagus and larynx.
- Esophagus: The tube that connects the throat with the stomach.
- Trachea: Also known as the windpipe, it connects the larynx to the lungs, allowing the passage of air.
External links
- Medical encyclopedia article on Pyriform sinus
- Wikipedia's article - Pyriform sinus
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