What is another word for Paranasal Sinus?
Pronunciation: [pˈaɹənˌe͡ɪzə͡l sˈa͡ɪnəs] (IPA) 
Paranasal sinuses are air-filled cavities located within the bones of the skull that surround and serve as a passageway for the nasal cavity. Alternative names for paranasal sinus include nasal sinus, maxillary sinus, frontal sinus, ethmoid sinus, and sphenoid sinus. The maxillary sinus is the largest of all the paranasal sinuses, while the ethmoid and sphenoid sinuses are located deeper within the skull. Paranasal sinuses are responsible for warming, filtering, and moisturizing the air that we breathe. When they become inflamed or infected, they can cause symptoms such as facial pain, pressure, and congestion. Treatment usually involves a combination of medication, nasal irrigation, and surgery if necessary.
