卵
黄
囊
l
u
ǎ
n
h
u
á
n
g
n
á
n
g
Definitions
1. yolk sac (ectodermal cells attaching fetus to uterus before the development of the placenta)
Components
卵黄
luǎn huáng
–
egg yolk
囊
náng
–
sack