Home   Chapter Home   Jobs   Conferences   Fellowships   Books



Advertisement

Placenta

Umbilical cord

Normal


Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 29 November 2011, last major update November 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.

Definition
=========================================================================

● Twisted “cable” that connects the fetus to the placenta and carries the two umbilical arteries and a single umbilical vein
● 2 arteries often merge near end of cord
● Vessels branch out over the fetal surface to form the villous tree

Gross description
=========================================================================

● Average size: 55–60 cm length and 2.0–2.5 cm diameter
● Insertion is normally central by mid-gestation, but may become more eccentric as gestation proceeds

Micro description
=========================================================================

Umbilical arteries: double layered muscular wall, no internal elastic lamina
Umbilical vein: larger diameter, thin wall with single layer of disorganized circular smooth muscle and an internal elastic lamina; no intima

Micro images
=========================================================================



Normal 3 vessel cord


Wharton’s jelly


Umbilical artery


Umbilical vein

End of Placenta > Umbilical cord > Normal


This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at copyrightPathOut@gmail.com with any questions (click here for other contact information).