Daughter nuclei moved towards the egg surface in the form of cometic energids to form blastoderm during the cleavage.
裂
以“彗星”状活质体向表面迁移，形成胚盘；
，
;
;房;Daughter nuclei moved towards the egg surface in the form of cometic energids to form blastoderm during the cleavage.
裂以“彗星”状活质体向表面迁移，形成胚盘；
periblast A layer of tissue between the yolk and cells of blastoderm which is observed as a thin border around blastula.
围胚层在
眙盘细胞之间的组织层，被观察到是一个围住囊胚的细缘。
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