Media in category "Paranasal sinuses" The following 35 files are in this category, out of 35 total 3D printed upper respiratory airways cast jpg 2,560 × 1,9;There are four groups of paranasal sinuses the maxillary, ethmoid, frontal, and sphenoid sinuses (see figure Locating the Sinuses) Sinuses reduce the weight of the facial bones and skull while maintaining bone strength and shape The airfilled spaces of the nose and sinuses also add resonance to the voice Locating the Sinuses The supporting structure of the upper part of the · Paranasal sinuses are airfilled spaces present within some bones around the nasal cavities The sinuses are Frontal, maxillary, sphenoidal, and ethmoidal All of them open into the nasal cavity through its lateral wall The function of the sinuses is to mack the skull lighter and add resonance to the voice Nasal And Paranasal Sinus Anatomy And Embryology Ento Key Paranasal sinuses easy diagram