tro·pho·blast /ˈtrofəˌblæst/
滋養層; 滋養母細胞
tro·pho·blast /ˈtrofəˌblæst/ 名詞
trophoblast
n : the membrane that forms the wall of the blastocyst in early
development; aids implantation in the uterine wall;
"after implantation of the blastocyst in the uterine wall
the trophoblast divides into two layers, the chorion and
the placenta"