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Questions and Answers
What is the function of the peritoneum?
Lines the internal walls of the abdominal and pelvic cavities, and clothes the viscera.
What are the two types of peritoneum mentioned in the text?
- Parietal peritoneum, 2. Visceral peritoneum
What is the peritoneal cavity?
The potential space between the parietal and visceral layers.
What is the main difference in the peritoneal cavity in males and females?
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What are the relations of the retroperitoneal space?
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What are the two parts into which the peritoneal cavity is divided?
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What is the definition of an intraperitoneal organ?
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Provide an example of a retroperitoneal organ.
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What are peritoneal ligaments?
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Describe the connection of the liver to the diaphragm using peritoneal ligaments.
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What is the function of the omental pancreas?
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Study Notes
Peritoneum Structure
- The peritoneum is a thin serous membrane that lines the walls of the abdominal and pelvic cavities.
- It consists of two connective tissue layers: parietal peritoneum (lines the internal walls of the abdominal and pelvic cavities) and visceral peritoneum (covers the external surface of digestive organs).
Peritoneal Cavity
- The peritoneal cavity is a potential space between the parietal and visceral layers of the peritoneum.
- In males, it is a closed cavity, but in females, it communicates with the exterior through the uterine tubes, uterus, and vagina.
Organs and Peritoneum
- Intraperitoneal organs are almost totally covered with visceral peritoneum and are suspended in the peritoneal cavity.
- Examples of intraperitoneal organs include the stomach, jejunum, ileum, and spleen.
- Retroperitoneal organs lie behind the peritoneum and are only partially covered with visceral peritoneum.
- Examples of retroperitoneal organs include the pancreas and the ascending and descending parts of the colon.
Peritoneal Ligaments
- Peritoneal ligaments are two-layered folds of peritoneum that connect solid viscera to the abdominal walls.
- Examples of peritoneal ligaments include the falciform ligament, coronary ligament, right and left triangular ligaments, and the lesser omentum.
Peritoneal Sac
- The peritoneal sac is divided into two parts: the greater sac and the lesser sac.
- The greater sac is the main compartment and extends from the diaphragm down into the pelvis.
- The lesser sac is smaller and lies behind the stomach.
- The two sacs are in free communication with each other through the oval window called the epiploic foramen.
Other Relations
- The mesentery is a fold of peritoneum that suspends the small intestine in the peritoneal cavity.
- The omentum is a peritoneal fold that connects the stomach to the transverse colon.
- The liver is connected to the diaphragm by the falciform ligament and the coronary ligament.
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Description
Test your knowledge on the anatomy and functions of the peritoneum. Learn about the different layers of the peritoneum and its role in protecting organs in the abdominal and pelvic cavities.