Sphenoid sinus

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

The sphenoid sinus is a paired paranasal sinus in the body of the sphenoid bone. It is one pair of the four paired paranasal sinuses. The two sphenoid sinuses are separated from each other by a septum. Each sphenoid sinus communicates with the nasal cavity via the opening of sphenoidal sinus.

Excerpt from the Wikipedia article “Sphenoid sinus”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: OpenStax College, CC BY 3.0, via Wikimedia Commons.