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体腔

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体腔(英语:body cavity),是由中胚层包裹的、内部充满液体的空间,分布在体壁和消化道之间。体腔是三胚层动物在胚胎早期发育,原肠形成之后,在内、外两胚层之间产生了中胚层,中胚层细胞通过不同的方式,在中胚层之间形成了体腔。

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体腔
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