In the embryo an undifferentiated mesodermal component of an early trunk or tail segment or metamere, derived from paraxial mesoderm.
在胚胎时,一个无法中胚层组一个早期、尾部片段体节,衍生自轴旁中胚层。
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During fetal development, the entire body derives from three layers, called germ layers, the ectoderm, mesoderm, and endoderm.
育过程由三个组成,分别是:外、中与内。
This constitutes a defect or absence of the vertebral arches, due to failure of mesoderm to organize over the region of the defect, and it may or may not involve the underlying meninges and neural tissue.
这导致了椎弓的畸形或失,这是由于中不陷区域处生长;椎弓的失可影响其下的脑脊膜和神经组织。
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