Connecting stalk

The connecting stalk is a yolk sac diverticulum.[1]

Connecting stalk
PrecursorExtraembryonic mesoderm
Latinpedunculus connectans
Anatomical terminology

It is derived from extraembryonic mesoderm.[2]

Progressive expansion of the amnion from the umbilical ring (surrounding the roots of the vitelline duct and connecting stalk) creates a tube of amniotic membrane. The amniotic membrane and its contents form the umbilical cord.[3]


  1. M. W. Rana (28 July 1998). Human embryology made easy. CRC Press. pp. 66–. ISBN 978-90-5702-545-7. Retrieved 22 May 2011.
  2. Schoenwolf, Gary C.; Bleyl, Steven B.; Brauer, Philip R.; Francis-West, Philippa H. (2012-05-07). Larsen's Human Embryology: with STUDENT CONSULT Online Access. Elsevier Health Sciences. p. 57. ISBN 9781455727919.
  3. Larsen's Embryology, 5th edition, p138.

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