头腔 head cavity

互联网2013-11-14

642

　　指脊椎动物头部所具有的真体腔部分而言。由肠体腔囊而来的真体腔是由侧板发生的，但其中头部这部分是由鳃裂分段的结果，在圆口类以上，事实上头腔只有口前的前下颌腔（ premandibular cavity）、和下颌腔（ mandibular cavity）残存。

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