Human Anatomy - Kotsan I. Y. 2009

Muscles and Fasciae of the Trunk
Topography of the Inner Surface of the Anterior Abdominal Wall

From the Abdominal cavity side, the inner surface of the anterior abdominal wall is lined with Peritoneum, which covers the protruding longitudinal anatomical structures and forms the longitudinal umbilical folds.

The median umbilical fold (plica umbilicalis mediana) is the obliterated embryonic urachus extending from the apex of the Urinary Bladder to the umbilicus.

The medial umbilical folds (plicae umbilicales mediales) are formed As a result of the obliteration of the fetal umbilical Arteries.

The lateral umbilical folds (plicae umbilicales laterales) correspond to the course of the inferior epigastric arteries and Veins.

In the lower part of the anterior abdominal wall, between the peritoneal folds, there are the following fossae: the lateral inguinal fossa (fossa inguinalis lateralis), located lateral to the lateral umbilical fold; the medial inguinal fossa (fossa inguinalis medialis), situated between the medial and lateral umbilical folds; and the supravesical fossa (fossa supravesicalis), located above the urinary bladder between the medial and median umbilical folds.



Last update: 08/08/2026

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