Chorion . Formed by trophoblast +extraembryonic mesoderm e Chorion frondosum (bushy chorion)-embryonic pole o Chorion laeve (smooth chorion)-abembryonic pole Decidua Chorion frondosum connecting ChorionIc cavity Yolk sac -chorionic Decidua Chorion laeveChorion •Formed by trophoblast +extraembryonic mesoderm •Chorion frondosum (bushy chorion)- embryonic pole •Chorion laeve (smooth chorion)- abembryonic pole