The extraembryonic membrane that contributes blood vessels for the formation of the umbilical cord in mammals is the Blank______.Multiple choice question.allantoischorionamnionyolk sac

Multiple Choice QuestionThe extraembryonic membrane that is the first site of blood cell formation in mammals is the Blank______.Multiple choice question.allantoisyolk sacamnionchorion

The extraembryonic membrane that contains fluid to cushion and protect the embryo is the Blank______.Multiple choice question.yolk sacallantoisamnionchorion

In placental mammals, the branching extension of the chorion that projects into the maternal tissues at the placenta is the Blank______.Multiple choice question.allantoischorionic villusamnionembryonic diskmesodermNeed help? Review the

he fetal half of the placenta develops from which extraembryonic membrane?Multiple choice question.AllantoisChorionYolk sacAmnion

Extraembryonic membranes are formed from Blank______ cells located Blank______ of the body of the embryo.Multiple choice question.maternal; insideembryonic; insidematernal; outsideembryonic; outside