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小马长了四颗牙是几岁
更新时间: 2020-11-02 00:00:00  

小马长了四颗牙是2岁。马的切齿由于采撷食物而受到磨损,这种牙齿磨灭具有明显的逐年变化规律,从而成为人们鉴定马匹年龄的主要手段之一。单根据马门齿的数目和形状,就可以确定马的年龄。

马的牙齿共40枚,分为臼齿、犬齿和切齿。臼齿上下颌各12枚,生长在深入口腔的后部,犬齿上下颌各2枚。公马犬齿大而发达,母马犬齿不发达,仅从齿龈黏膜部露出一点点。因此有人认为母马只有36枚牙齿,没有犬齿。

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