Posted on July 23, 2020 By Robert Payne
鼻腔,呼吸道最前部由骨和软骨围成的空腔,为呼吸系统的起始部。以鼻中隔分为左右两半,前端经鼻孔与外界相通,后端经鼻后孔与咽腔相连。
by Robert Payne
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