Editing Paranasal sinuses (section)

==Structure==
Humans possess four pairs of paranasal sinuses, divided into subgroups that are named according to the [[bone]]s within which the sinuses lie. They are all innervated by branches of the [[trigeminal nerve]] (CN V).
* The [[maxillary sinus]]es, the largest of the paranasal sinuses, are under the [[Human eye|eye]]s, in the [[maxillary bones]] (open in the back of the [[semilunar hiatus]] of the nose). They are innervated by the [[maxillary nerve]] (CN V2).<ref name=":0">{{Cite web|date=2016-08-24|title=Paranasal Sinus Anatomy: Overview, Gross Anatomy, Microscopic Anatomy|url=http://emedicine.medscape.com/article/1899145-overview}}</ref>
* The [[frontal sinus]]es, superior to the eyes, in the [[frontal bone]], which forms the hard part of the [[forehead]]. They are innervated by the [[ophthalmic nerve]] (CN V1).<ref name=":0" />
* The [[ethmoid sinus|ethmoidal sinus]]es, which are formed from several discrete air cells within the [[ethmoid bone]] between the [[human nose|nose]] and the eyes. They are innervated by the [[ethmoidal nerves]], which branch from the [[nasociliary nerve]] of the ophthalmic nerve (CN V1).
* The [[sphenoidal sinus]]es, in the [[sphenoid bone]]. They are innervated by the ophthalmic and maxillary nerve (CN V1 and V2).<ref name=":0" />

The paranasal sinuses are lined with [[respiratory epithelium]] (ciliated pseudostratified columnar epithelium).