Pelvic Anatomy and Peritoneal Spaces

📋 Course Outline

1. Abdominopelvic spaces and peritoneum
2. Bony pelvis and pelvic boundaries
3. Pelvic floor and perineum
4. Kidneys and retroperitoneal anatomy
5. Renal blood supply and venous return
6. Ureters and bladder
7. Male genitalia
8. Female genitalia

📖 1. Abdominopelvic spaces and peritoneum

🔑 Key Concepts & Definitions

• Abdominopelvic cavity : The abdominopelvic cavity is the large space bounded by diaphragm superiorly, body wall anteriorly and the pelvic floor inferiorly.
• Peritoneal balloon : The peritoneal balloon describes the peritoneum as a flexible “inner lining” that forms a space inside the abdominopelvic cavity.
• Extraperitoneal spaces : Extraperitoneal spaces are regions in the abdomen and pelvis that lie outside the peritoneal cavity, including retroperitoneal, preperitoneal, and subperitoneal compartments.

📝 Essential Points

• Extraperitoneal compartments in the abdomen and pelvis include retroperitoneal, preperitoneal, and subperitoneal spaces.
• The abdominopelvic cavity is bounded superiorly by the diaphragm, laterally/anterolaterally by the anterolateral wall muscles, posteriorly by posterior muscles plus vertebral column, and inferiorly by the pelvic floor.
• Extraperitoneal structures are immobile, embedded in connective tissue, and are not visible or accessible after opening the peritoneal cavity.

💡 Memory Hook