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四体不勤、五谷不分----游山玩水、吃香喝辣

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河马的牙齿十分稀疏, 如何解决进食问题

2010-09-02 21:21:00| 分类：动物世界 | 标签： |举报 |字号大中小订阅

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河马生性好斗: 除了不停将自己的排泄物泼向四周, 划分领地之外; 还喜欢时刻张开血盆大口, 露出尖锐的牙齿, 警告各类动物--不要搞事。

不过看着河马口中零星的几颗犬齿, 很难想象它可以嚼烂草料、填饱肚腹;

那么, 提问: 河马的牙齿十分稀疏, 如何解决进食问题?

回答:

俗话说“耳听为虚、眼见为实”, 但是放在这里显然不适合--河马口中除了明显的四颗犬齿之外, 牙床上还有四十余颗臼齿--通常看不出来; 可以充分、方便地碾磨食物。

此外, 河马口中还生长着秘密武器--一块刷状物体--当其牙齿中有残留物体时, 河马就会活动口腔, 刷状物体遂类似于牙刷, 上上下下地清洁牙齿; 使残留物聚积一处, 以便清理。

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