yolk endoderm
英
美
卵黄（囊）内胚层
双语例句
- The migratory path of PGCs is: endoderm of yolk sac → endoderm of intestinal area → dorsal mesentery → genital ridge.
原始生殖细胞迁移路径为：卵黄囊内胚层→肠区内胚层→背肠系膜→生殖嵴； - Migratory mode: from endoderm of yolk sac to endoderm of intestinal area is passive, from dorsal mesentery to genital ridge is active.
迁移方式：从卵黄囊内胚层到肠区内胚层为被动迁移过程；背肠系膜到生殖嵴为主动迁移过程；