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Anatomy of the peritoneum and peritoneal cavity

Anatomy of the peritoneum and peritoneal cavity


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Anatomy of the peritoneum and peritoneal cavity

Figure 1: Midsagittal view of the peritoneum and peritoneal cavity. 

Figure 2: Subdivisions of the peritoneal cavity. A. Midsagittal and B. Transverse sections showing the greater and lesser sacs. 

Figure 3: Lesser sac (Omental bursa). A. Midsagittal view. B. Anterior view with stomach reflected. C. Transverse section, inferior view.

Figure 4: Mesenteries of the intestines.

Figure 5: Greater and lesser omenta of the abdomen.

Figure 6: Development of the gut and mesenteries. A. Gut tube migrates from posterior abdominal wall, bringing the dorsal mesentery with it. B. Gut elongates and enlarges. C. Organs grow and rotate, resulting in twists in the mesenteries and peritoneal reflections (ligaments) that connect adjacent organs.

Figure 7: Schematic transverse sections showing the relationships of abdominal organs to the dorsal and ventral mesenteries during development.

A. Organs and mesenteries are in the midline during 5th week of development. B. The organs rotate to the right. C. and D. Fusion of a portion of the dorsal mesentery with the parietal peritoneum of posterior abdominal wall leaves the pancreas in a retroperitoneal position.

Figure 8: Embryological origin of the ventral mesentery. A. Ventral mesentery is derived from the septum transversum (mesoderm). B. Enlarging liver contacts the septum transversum, and portion of ventral mesentery covering the liver splits apart leaving a bare area of the liver, uncovered by visceral peritoneum.



USMLE® Step 1 style questions USMLE

2 questions

A partial liver resection is performed in a patient with an early stage hepatocellular carcinoma in the left lobe of the liver. During the procedure, a ligament is found that attaches the liver to the anterior abdominal wall. Which of the following structures are contained within this ligament?  

Memory Anchors and Partner Content
  1. "CARE OF THE NEW BORN REVISED 8ED (2017)" CBS Publishers & Distributors Private Limited (2014)
  2. "Knowledge is Power" Library and Archives Canada / Emergent Phenomenon Publishing (2019)
  3. "Grant's Dissector" Lippincott Williams & Wilkins (2012)
  4. "Peritoneal Physiology" Chronic Kidney Disease, Dialysis, and Transplantation (2019)
  5. "Surgical anatomy and anatomic surgery – Clinical and scientific mutualism" The Surgeon (2013)
  6. "Terminology and nomenclature in colonic surgery: universal application of a rule-based approach derived from updates on mesenteric anatomy" Techniques in Coloproctology (2014)
  7. "The subperitoneal space and peritoneal cavity: basic concepts" Abdominal Imaging (2015)
  8. "Chronic Kidney Disease, Dialysis, and Transplantation E-Book" Elsevier Health Sciences (2018)
  9. "The subperitoneal space and peritoneal cavity: basic concepts" Abdominal Imaging (2015)