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The lesser sac, also known as the omental bursa, is the cavity in the abdomen that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the epiploic foramen (also known as the Foramen of Winslow). In mammals, it is not uncommon for the lesser sac to contain considerable amounts of fat.
Additional recommended knowledge
In human anatomy, the wall of the stomach, pancreas and splenic artery are a part of the wall of the lesser sac. If these structures rupture they may leak into the lesser sac. For the stomach, which lies anterior to the omental bursa, the rupture must be on the posterior side, as if it were anteriorly located, the leak would collect in the greater sac.
The lesser sac is embryologically formed from an infolding of the greater omentum. The open end of the infolding, known as the epiploic foramen, is usually proximal to the stomach.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lesser_sac". A list of authors is available in Wikipedia.|