1. What is the peritoneum?
A continuous serous membrane lining the abdominopelvic cavity and covering many abdominal and pelvic organs.
2. What are the two layers of the peritoneum?
The parietal peritoneum and visceral peritoneum.
3. What does the parietal peritoneum line?
The internal surfaces of the abdominopelvic walls.
4. What does the visceral peritoneum cover?
The external surfaces of intraperitoneal organs.
5. What type of epithelium forms the surface of the peritoneum?
Simple squamous mesothelium supported by connective tissue.
6. What is the peritoneal cavity?
The potential space between the parietal and visceral peritoneum.
7. What is the main function of peritoneal fluid?
To lubricate peritoneal surfaces and reduce friction during organ movement.
8. What are the two principal compartments of the peritoneal cavity?
The greater sac and lesser sac, also called the omental bursa.
9. Which opening connects the greater sac and lesser sac?
The epiploic foramen, also called the foramen of Winslow.
10. What is a mesentery?
A double layer of peritoneum that suspends an organ and provides a pathway for vessels, nerves, and lymphatics.
11. What is the greater omentum?
A large, apron-like peritoneal fold extending from the greater curvature of the stomach and proximal duodenum.
12. What is the lesser omentum?
A double-layered peritoneal fold connecting the liver to the lesser curvature of the stomach and proximal duodenum.
13. Which two ligaments form the lesser omentum?
The hepatogastric ligament and hepatoduodenal ligament.
14. Which structures form the portal triad within the hepatoduodenal ligament?
The portal vein, proper hepatic artery, and common bile duct.
15. What distinguishes an intraperitoneal organ from a retroperitoneal organ?
An intraperitoneal organ is almost completely covered by visceral peritoneum, whereas a retroperitoneal organ lies behind the parietal peritoneum.
16. Which digestive organs are secondarily retroperitoneal?
Most of the duodenum, most of the pancreas, and the ascending and descending colon.
17. What divides the greater sac into supracolic and infracolic compartments?
The transverse colon and transverse mesocolon.
18. What divides the infracolic compartment into right and left spaces?
The root of the small intestinal mesentery.
19. What are the paracolic gutters?
Peritoneal channels lateral to the ascending and descending colon that permit movement of intraperitoneal fluid.
20. Where is the hepatorenal recess located?
Between the right lobe of the liver and the right kidney.
21. How is the parietal peritoneum innervated?
By somatic sensory nerves supplying the adjacent body wall.
22. How is the visceral peritoneum innervated?
By visceral afferent fibers traveling with autonomic nerves associated with the underlying organs.
23. How does pain from the parietal peritoneum typically present?
As sharp, well-localized pain that may be accompanied by abdominal guarding.
24. How does pain from the visceral peritoneum typically present?
As dull, poorly localized pain that may be referred to a distant body region.
25. Which nerve carries sensory fibers from the central diaphragmatic peritoneum?
The phrenic nerve, arising from spinal segments C3 to C5.
26. How does the blood supply of the parietal peritoneum differ from that of the visceral peritoneum?
Parietal peritoneum receives vessels from the body wall, while visceral peritoneum receives vessels associated with the organs it covers.
27. What are the embryological origins of the two peritoneal layers?
Parietal peritoneum develops from somatic mesoderm, while visceral peritoneum develops from splanchnic mesoderm.
28. What is the relationship between the female reproductive tract and the peritoneal cavity?
The uterine tubes provide an indirect communication with the exterior through the uterus and vagina.
29. What is ascites?
An abnormal accumulation of free fluid within the peritoneal cavity.
30. What are peritoneal adhesions?
Fibrous bands connecting peritoneal surfaces, often following inflammation or surgery, that may cause intestinal obstruction.
