Peritoneum and Greater Sac

A 52-year-old man from Delhi presents to the emergency department with acute onset severe abdominal pain and abdominal distension. On examination, he is febrile (38.5°C), tachycardic (110 bpm), and has rigid abdomen with rebound tenderness. His bowel sounds are absent. Plain abdominal X-ray shows multiple air-fluid levels and free air under the diaphragm. During emergency exploratory laparotomy, the surgeon finds a perforated duodenal ulcer with purulent fluid in the peritoneal cavity. The greater sac is found to be heavily contaminated with gastric contents and bacteria. Which anatomical feature of the peritoneum would have normally limited the spread of infection in this case if the patient had sought treatment earlier?

A 48-year-old woman from Mumbai undergoes elective laparoscopic cholecystectomy for cholelithiasis. During the procedure, the surgeon inadvertently creates a small iatrogenic perforation of the small bowel mesentery, causing bleeding into the peritoneal cavity. The patient develops a hemoperitoneum with approximately 500 mL of blood in the greater sac. Postoperatively, she remains hemodynamically stable and imaging shows the bleeding has stopped. Which anatomical property of the greater sac peritoneum explains why she did not develop acute shock despite significant intra-abdominal bleeding?