耳 Mastoid process (auricle External ear Pinna External Temporal bone semicircular canals canal ry audito auricle(耳廓) Auditory nerve Malleus external acoustic meatus(gN 耳道) tympanic membrane ( eardrum)(鼓膜) Cochlea Middle ear: tympanic cavit!y(鼓室) Temporal bone Stapes auditory tube(咽鼓管) Ear lobe cartilage (stirrup) Ear drum tympanic Eustachian Extern al ear membrane) tube mastoid process(乳突小房 Round window 〔 enestra cochleae)External ear ： • auricle（耳廓） • external acoustic meatus（外 耳道） • tympanic membrane (eardrum)（鼓膜） Middle ear： • tympanic cavity（鼓室） • auditory tube（咽鼓管） • mastoid process（乳突小房） (auricle) Mastoid process 耳