天气预报 > 其他 > 牙齿的叫法都包括哪些
牙齿的叫法都包括哪些
更新时间: 2020-11-03 00:00:00  

牙齿按存在的时间可以叫乳牙和恒牙,牙齿按形态及功能可以叫切牙、尖牙、前磨牙、磨牙。

牙齿是人体中最坚硬的器官,分为牙冠、牙颈和牙根三部分。又分为牙釉质(珐琅质)、牙本质(象牙质)、牙髓(神经腺)等。

关键词: 牙齿 叫法 包括 哪些

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