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                  Peritoneum      Structures       Development       Disease states      Classification of abdominal structures

                              

Peritoneum Development

The peritoneum develops ultimately from the mesoderm of the trilaminar embryo. As the mesoderm differentiates, one region known as the lateral plate mesoderm splits to form two layers separated by an intraembryonic coelom. These two layers develop later into the visceral and parietal layers found in all serous cavities, including the peritoneum.

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As an embryo develops, the various abdominal organs grow into the abdominal cavity from structures in the abdominal wall. In this process they become enveloped in a layer of peritoneum. The growing organs "take their blood vessels with them" from the abdominal wall, and these blood vessels become covered by peritoneum, forming a mesentery.

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The epiploic foramen, greater sac or general cavity (red) and lesser sac, or omental bursa (blue).

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Horizontal disposition of the peritoneum in the upper part of the abdomen. (Areas outlined in blue and red correspond to above diagram.)

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