connecting stalk

con·nect·ing stalk

the extraembryonic precursor of the umbilical cord by which the caudal end of the embryo is attached to the chorion.
Synonym(s): body stalk
References in periodicals archive ?
The jelly resists twisting and compression, thus serving to protect the critical vascular lifeline, the formation of the umbilical cord begins when the connecting stalk of the extraembryonic mesoderm links the embryo to the trophoblast.