Paranasal air sinuses

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The paranasal air sinuses are hollow pockets in bones surrounding the nasal cavity. The sinuses are named after the bone in which they are located.

**Figure 1. Paranasal air sinuses** (Credit: Patrick J. Lynch, CC BY-SA 2.5)

Frontal sinuses
Ethmoid air cells
Sphenoid sinuses
Maxillary sinuses

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Paranasal air sinuses

Functions

Sinuses and their drainage

Clinical information

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