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为什么婴儿的骨骼比成人的多

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为什么婴儿的骨骼比成人的多?

成人人ti中的骨骼共有206块,它们大小不同、形状各异,但却巧妙的连接在一起,组成一个完meijian固的人ti支架系统。有趣的是,刚chu生的婴儿却有300多块骨tou!在以后的生长过程中,有些骨tou互相愈合成了一块,慢慢变成了206块。

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