各部位背侧面皮肤总厚度较腹侧面厚。
The total thickness of dorsal skin was thicker than ventral skin.
胸骨由7枚胸骨节构成，其腹侧面平坦。
The sternum is made up of 7 sternebrae, its ventral surface is somewhat smooth.
神经管腹侧面体节处间充质细胞呈现细胞凋亡节段性分布。
In addition, the apoptotic cells were metamerically distributed at the ventral somites of neural tube in the median sections.
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