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尾叉骨是哪个部位

更新时间: 2020-11-06 00:00:00     

尾叉骨位于后退的第一块骨头,它是尾骨与眼睛骨的相连体,故名尾叉骨。

叉骨坚实而富有弹性,在鸟翼剧烈搧动时可避免左右乌喙骨向中间靠近发生碰撞、挤压气管,并增加肩带弹性.无飞翔能力的鸵鸟等平胸总目鸟类,叉骨退化成为乌喙骨的一部分。

关键词: 哪个 部位

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