Paranasal sinus
Paranasal Sinus
The Paranasal Sinus (pronunciation: /ˌpærəˈneɪzəl ˈsaɪnəs/) refers to a group of four paired air-filled spaces that surround the nasal cavity. The etymology of the term is derived from the Latin words "para" meaning beside, "nasal" referring to the nose, and "sinus" meaning cavity or pocket.
Anatomy
The paranasal sinuses are divided into four groups: the Maxillary sinuses, the largest of the four, located under the eyes; the Frontal sinuses, located above the eyes; the Ethmoid sinuses, located between the eyes and the bridge of the nose; and the Sphenoid sinuses, located in the bones behind the nasal cavity.
Function
The primary function of the paranasal sinuses is to produce a mucus that moisturizes the inside of the nose. This mucus layer protects the nose from pollutants, micro-organisms, dust, and dirt. Sinuses also play a role in our voice's tone and timbre.
Related Terms
- Sinusitis: An inflammation or swelling of the tissue lining the sinuses.
- Rhinosinusitis: A condition where both the nose and the sinuses are inflamed.
- Nasal Polyps: Noncancerous growths in the lining of the nasal passage or sinuses.
- Sinus Surgery: A surgical procedure to remove blockages in the sinuses.
See Also
External links
- Medical encyclopedia article on Paranasal sinus
- Wikipedia's article - Paranasal sinus
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