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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.
Paranasal means around or near your nose. Sinuses are spaces or small tunnels. Paranasal sinuses are small, air filled spaces within the bones of your face. They are below and between your eyes, above and behind your nose, and behind your cheeks.he paranasal sinuses. Paranasal means around or near your nose. Sinuses are spaces or small tunnels. Paranasal sinuses are small, air filled spaces within the bones of your face, above and behind your nose and behind your cheekbones. They give your voice its clarity and tone and lighten the weight of your skull.