人的耳朵由外耳、中耳和内耳三部分组成.在头部两侧突出的部分是外耳,其他部分在头部里(如图所示).外耳由耳廓、外耳道组成.中耳有三块相互连接的听小骨,分别是锤骨、砧骨和镫骨,每一块听小骨都只有米粒大小,是人体中最小的骨头.锤骨连接外耳的鼓膜,镫骨连接内耳的卵圆窗膜.内耳 The human ear consists of the outer ear, the middle ear, and the inner ear. The part that protrudes on both sides of the head is the outer ear, and the other part is in the head (as shown in the figure). The outer ear consists of the pinna and the external auditory canal. The middle ear has three pieces. The connected ossicles are the malleus, the incus and the sacrum. Each ossicle is the size of the rice and is the smallest bone in the body. The ossicle connects the tympanic membrane of the external ear and the sacrum connects the oval window membrane of the inner ear. inner ear