al­ki­o­rak­ku­lan u­loin ­so­lu­ker­ros

1. 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"

Synonyymit

Hierarkia