Organization of the vestibulocochlear organs Auricle External ear External acoustic meatus ympanIc membrane Tympanic cavity Middle ear Auditory tube Mastoid antrum air cell Bony labyrinth Internal ear Membranous labyrinth 内耳道Organization of the vestibulocochlear organs External ea r Auricle External acoustic meatus External acoustic meatus Tympanic membrane Tympanic cavity Middle ear Tympanic cavity Auditory tube Bon y lab yrinth Mastoid antrum & air cell It l y y Membranous labyrinth In ternal ea r 3