Daughter nuclei moved towards the egg surface in the form of cometic energids to form blastoderm during the cleavage.
卵裂
子
以“彗星”状活
体向卵表面迁移，形成胚
；
;
心，子;Daughter nuclei moved towards the egg surface in the form of cometic energids to form blastoderm during the cleavage.
卵裂子以“彗星”状活体向卵表面迁移，形成胚；
periblast A layer of tissue between the yolk and cells of blastoderm which is observed as a thin border around blastula.
围胚层在卵黄与
之间的组织层，被观察到是一个围住囊胚的缘。
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