Where are paranasal sinuses located facial bones containing paranasal sinus cavities anatomy development drainage how do they work what do they do diagram. The paranasal sinuses are air filled extensions of the respiratory part of the nasal cavity there are four paired sinuses named according to the bone they are . 1 paranasal sinuses anatomy and function glen t porter md francis b quinn md facs the university of texas medical branch department of otolaryngology. This article discusses the anatomy and clinical aspects of the paranasal sinuses learn all about these air filled spaces around the nasal cavity at kenhub
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