amphiblastic cleavage

英 美
  • 双极卵裂
    1. This marks the end of the cleavage stage of development.
      这标志着卵裂发育阶段的结束。
    2. Cleavage produces a blastula, a sheet of cells rounded into a sphere that in most species surrounds a cavity.
      卵裂产生一个囊胚,形成的细胞壁球形排列形成一个空腔。