Middle ear中耳 Consists of three parts Tympanic cavity鼓室 Auditory tube咽鼓管 Mastoid antrum乳突窦 and mastoid cells乳突小房 外耳 内耳 何 的?Consists of three parts ◼ Tympanic cavity 鼓室 ◼ Auditory tube 咽鼓管 ◼ Mastoid antrum 乳突窦and mastoid cells 乳突小房 Middle ear 中耳