05/15/2026
Abdominopelvic Interrelationships: Analysis by the_drjoe
“Your abdomen isn’t just organs packed together - it’s organized by a giant membrane called the peritoneum 🎯 This is how your gut is suspended, protected, and given room to move.
*What you’re seeing in this sagittal view:*
*Peritoneal sacs - the spaces:*
- *Greater sac*: The main peritoneal cavity. It’s the big pink space holding most of your intestines, stomach, and liver.
- *Lesser sac*: The “omental bursa” behind the stomach. It’s a separate compartment connected to the greater sac through the *epiploic foramen*. Surgeons care about this because infections and fluid can get trapped here.
*Peritoneal folds - the connections:*
- *Lesser omentum*: Connects liver to stomach and duodenum. Holds the portal triad - portal vein, hepatic artery, bile duct.
- *Greater omentum*: Hangs off the stomach like an apron. Fatty, mobile, and called the “policeman of the abdomen” because it walls off infections.
- *Transverse mesocolon & Sigmoid mesocolon*: Attach transverse and sigmoid colon to the posterior abdominal wall, carrying blood vessels and nerves.
- *Mesentery*: The fan-like fold attaching small intestine to the back wall. Everything you eat passes through it.
*Pouches - potential spaces:*
- *Rectouterine pouch*: The deepest point in females. Fluid, blood, pus collects here.
- *Uterovesical pouch*: Between bladder and uterus.
- *Rectovesical pouch*: The male equivalent.
*Organs shown*: Liver with *caudate lobe*, stomach, *third part of duodenum*, pancreatic body, uterus, re**um, urinary bladder, p***c symphysis.
Why this matters: Peritonitis, ascites, and tumor spread all follow these spaces. Know the peritoneum, and you can predict where disease will go.
What’s crazier: that your small intestine is suspended by a 6-foot-long mesentery, or that the greater omentum actively moves to contain infections? Ever thought about how much organization is inside your belly?”
- thedrjoe
Image: Authors
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http://www.secretlifeoffascia.com/
