The abdominopelvic cavity is lined v a serous membrane called the peritoneum. This membrane broadens from the internal surface of the abdominal wall surface to fully or partly surround offal of the abdominopelvic cavities.




You are watching: A double layer of peritoneum; sheet of two fused serous membranes.

The peritoneum is a serous membrane that is composed of 2 layers: parietal peritoneum and also visceral peritoneum (Figure 8-1A–C). The parietal peritoneum lines the inner walls the the ab cavity, developing a closeup of the door sac known as the peritoneal cavity. The peritoneal cavity is fully closed in males. In females, the peritoneal cavity has two openings whereby the uterine tubes, uterus, and also vagina carry out a i to the outside. The parietal peritoneum shows off that the posterior ab wall, forming a fused, double layer the peritoneum neighboring the blood vessels, nerves, and lymphatics to abdominal organs. This double layer the peritoneum, well-known as the mesentery, suspends the jejunum and also ileum native the posterior ab wall. The peritoneum that surrounds the gut tube is dubbed the visceral peritoneum. The peritoneal membranes develop a serous fluid that lubricates the peritoneal surfaces, permitting the intraperitoneal organs to slide throughout one another with minimal friction.


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Figure 8-1Graphic run Location
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A. Sagittal ar of the peritoneum and mesentery. B. Relationship of the mesentery and neurovascular supply to the intraperitoneal organs. C. Axial (cross-section) the the peritoneum and also mesentery.