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Paranasal sinuses are filled with air Their function is to-humidify and warm the inspired air,provide resonance to voice,lighten the skull bones, andact as thermal insulatorsâ¦ to protect orbit and cranium from variation in temperature of air in our nose Paranasal sinuses are air containing cavities (hollow spaces) in certain bones of skull.
air-containing cavities that form from the nasal mucosa and communicate with the nasal fossae. paranasal sinuses. Name the 4 bones that contain the paranasal sinsuses.