Basal layer cells of the primary epidermal ridge exhibited focal aggregation and formed hillocks at EGA 12-13W. The first wave of coat hair development is initiated around EGA 12-14W.

 
  • 在E12周,表皮僅由1-2層細胞組成,表皮嵴較明顯,出現局灶增殖相間分布細胞團;
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan