The sinuses have two principal functions: because they are filled with air, they help keep the weight of the skull within reasonable limits, and they serve as ... |
21 янв. 2018 г. · Sinuses are air-filled sacs (empty spaces) on either side of the nasal cavity that filter and clean the air breathed through the nose and ... |
These sphenoidal sinuses work to make the skull lightweight and to increase resonance. |
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