Description

The linea alba presents the umbilicus, with a fibrous annulus (the umbilical ring) which in the fetus exists as an aperture and transmits the umbilical vessels, is closed in the adult.


This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).

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