Definition for Paranasal Sinuses
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Revision as of 16:44, 29 December 2019 by Bolbol (Talk | contribs) (Created page with "Are mucous membrane-lined cavities in the frontal, maxillary, sphenoid and ethmoid bones. Category:Biology")
Are mucous membrane-lined cavities in the frontal, maxillary, sphenoid and ethmoid bones.