Final answer:
About 7 liters of peritoneal fluid are produced and absorbed daily, aligned with the internal secretion involved in digestive processes.
Step-by-step explanation:
Approximately 7 liters of peritoneal fluid are produced and reabsorbed each day. This fluid is part of a complex process involving the peritoneal lining and serves several functions, including allowing the organs within the abdominal cavity to move against each other smoothly. The number mentioned aligns with the internal secretion ranges involving digestive processes, from which most of the fluid is reabsorbed.