<prompt> All are structures passing between the base of skull and the superior constrictor except:Glossopharyngeal nervePharyngobasilar fasciaEustachian tubeLevator veli palate  <response>: Ans: a Glossopharyngeal nerve Ref: Chaurasia, 4th ed, vol 3p. 223 Fig. 14.18, p. 225he structures passing between the superior constrictor and the base of skull sinus of morgagni:A-L-A-Auditory tubeLevator veli palateAscending palatine arteryAuditory tube is about 3.6 cm long and is divided into an outer bony part which is 12 mm long and an inner cartilagenous part which is 24 mm long.The levator veli palati is attatched to its inferior surface.Ascending palatine artery is a branch of facial arteryAlso note:Structures passing through the superior orbital fissureUpper part:Middle part:Rc meningeal branch of the ophthalmic arteryLacrimal nerveFrontal nerveSuperior ophthalmic veinTrochlear nerveLower part:Inferior ophthalmic veinOculomotor nerveNaso ciliary nerveAbducent nerveThe structures passing between superior and middle constrictors-StylopharyngeusGlossopharyngeal nerveBetween middle and inferior constrictors:Internal laryngeal nerve-Superior laryngeal vesselsBetween low er border of inferior constrictor and esophagusRecurrent laryngeal nerve Pierces thyrohyoid membraneInferior laryngeal vessels 