Body-stalk

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Body-stalk
Gray27.png
Diagram showing the expansion of amnion and delimitation of the umbilicus.
Gray21.png
Section through the embryo.
Gray's subject #10 53
Dorlands/Elsevier s_21/12755040

The caudal end of the embryo is at first connected to the chorion by a band of mesoderm called the body-stalk, but with the formation of the caudal fold the body-stalk assumes a ventral position; a diverticulum of the yolk-sac extends into the tail fold and is termed the hind-gut.

The function of the body-stalk is later replaced by the umbilical cord.

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