| 释义 |
yolk-sac 英'jəʊks'æk美'jəʊks'æk BNC¹⁷³⁹⁹⁵⁺²
基本英英例句
卵黄囊¹⁰⁰
名词 yolk sac:
membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functionalmembranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryoThe yolk sac is gradually vascularized.卵黄囊逐渐被血管化了。
The dye Trypan Blue has a remarkable biphasic effect on pinocytosis by yolk sal.染料锥虫蓝对卵黄囊的胞饮作用具有明显的双向作用。 |