connecting stalk

The body cavity closes, except in the region of the connecting stalk.

The connecting stalk is a yolk sac diverticulum.

The connecting stalk forms the umbilical vasculature.

The human allantois is an endodermal evagination of the developing hindgut which becomes surrounded by the mesodermal connecting stalk.

Blood islands arise external to the developing embryo on the umbilical vesicle, allantois, connecting stalk and chorion.

When day 13 rolls around, the connecting stalk, a dense portion of extraembryonic mesoderm, restrains the embryonic disc in the chorionic cavity.

The embryo is joined to the trophoblastic shell by a narrow connecting stalk that develops into the umbilical cord to attach the placenta to the embryo.

The lateral body wall folds, pulling the amnion in with it so that the amnion surrounds the embryo and extends over the connecting stalk, which becomes the umbilical cord, which connects the fetus with the placenta.