Connecting stalk

Connecting stalk
Details
Identifiers
Latin	pedunculus connectans
Code	TE E5.11.3.1.1.0.4
*Anatomical terminology* [edit on Wikidata]

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

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 (Larsen's Embryology, 5th edition, p138).

References

↑ M. W. Rana (28 July 1998). Human embryology made easy. CRC Press. pp. 66–. ISBN 978-90-5702-545-7. Retrieved 22 May 2011.
↑ 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.

Development of the circulatory system

Heart

Tubular heart	Truncus arteriosus Bulbus cordis Primitive ventricle Primitive atrium Sinus venosus

Septa	Atrioventricular cushions/Septum intermedium Primary interatrial foramen Septum primum Foramen secundum Septum secundum Foramen ovale Aorticopulmonary septum

Other	Atrioventricular canal Primary interventricular foramen Protein signalling in heart development

Vessels

Arteries	Dorsal aorta Aortic arches Aortic sac

Veins	Anterior cardinal vein Posterior cardinal vein Common cardinal veins

Lymph vessels	Lymph sacs

Extraembryonic
hemangiogenesis

Fetal circulation

umbilical cord: Umbilical vein → Ductus venosus → Inferior vena cava → Heart → Pulmonary artery → Ductus arteriosus → Aorta → Umbilical artery

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