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大家在搜：有管细胞后鳃动物心囊寄生幼虫孵化场壳腺刚毛端毛轮幼虫中胚层母细胞顶板

肛孔

网络anal pore

肛孔

1

肛孔在腹侧，呈新月形，位于尾突基部向前约90μm处。

The ventrally located crescent anus is situated about 90 μ m from the base of the mucron .
2

对照组在静态及动态时髂尾肌、耻尾肌、耻直肌面积及肛提肌裂孔宽度均无显著差异（P0.05）。

There were not significant diference of the dynamic and static areas of iliococcygeus , pubococcygeus and puborectalis , the widths of levator hiatus in control groups ( P0.05 ) . 3 .

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