Alpine, J.2020-12-292020-12-291991http://hdl.handle.net/2263/77587A. Frontal sinus B. Sphenoid sinus C. Posterior ethmoid sinus D. Ethmoid bulla E. Semilunar hiatus F. Uncinate process G. Opening of frontal sinus (fronto-nasal duct) H. Opening of sphenoid sinus I. Opening of maxillary sinus J. Accessory opening of maxillary sinus K. Superior nasal concha L. Middle nasal concha M. Inferior nasal concha N. Opening of auditory tube O. Toru tobarius P. Limen of insulaA.   Frontal sinusB.   Sphenoid sinusC.   Posterior ethmoid sinusD.   Ethmoid bullaE.   Semilunar hiatusF.    Uncinate processG.   Opening of frontal sinus (fronto-nasal duct)H.   Opening of sphenoid sinusI.     Opening of maxillary sinusJ.    Accessory opening of maxillary sinusK.   Superior nasal conchaL.    Middle nasal conchaM.  Inferior nasal conchaN.   Opening of auditory tubeO.   Toru tobariusP.   Limen of insula