The oocytes are released from the germinal epithelia into the coelom at a relatively early stage of development during vitellogenesis.

 
  • 雌性生殖細胞不形成合胞體,卵母細胞在發(fā)育的早期階段,卵黃發(fā)生期間從卵巢(生殖上皮)排入體腔中,并在體腔中發(fā)育。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan