卵黄囊

卵黃囊
luǎnhuángnáng
yolk sac (ectodermal cells attaching fetus to uterus before the development of the placenta)

CEDICT

  1. (anatomy) yolk sac
  2. yolk sac

Wiktionary

连结在胚胎上、由胚盘附近的下胚层细胞所组成的膜状囊，为发育早期的胚胎提供所需的血液供应

維基詞典

Entry Composition

1 卵黄 luǎnhuáng egg yolk
2 囊 náng
  1. sack
  2. purse
  3. pocket (for money)