This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal wall ,Inguinal and Femoral region, Subject name: Anatomy
Subdiaphragmatic peritoneum is more absorptive than pelvic peritoneum because the former possess:- 
Select and explain. 
A. Larger macrophages, B. Bigger stomata, C. Wider capillaries, D. Wide surface area
D: Wide surface area
Answer: D: Wide surface area 
Explanation: The mesothelium acts as a semipermeable membrane across which fluids and small molecules of various solutes can pass & the peritoneum can absorb fluid effusions from the peritoneal cavity. Water and crystalloids are absorbed directly into the blood capillaries, whereas colloids pass into lymphatics with the aid of phagocytes. The greater absorptive power of the upper abdomen (subphrenic area) is due to its larger surface area and because respiratory movements aid absorption.