What are the peritoneal and retroperitoneal organs?

The intraperitoneal organs are the stomach, spleen, liver, bulb of the duodenum, jejunum, ileum, transverse colon, and sigmoid colon. The retroperitoneal organs are the remainder of the duodenum, the cecum and ascending colon, the descending colon, the pancreas, and the kidneys.Click to see full answer. Consequently, what is the difference between peritoneal and retroperitoneal?For example, a kidney is inside the abdominal cavity, but is retroperitoneal—located outside the peritoneum. The potential space between these two layers is the peritoneal cavity. It is filled with a small amount of slippery serous fluid that allows the two layers to slide freely over each other.Likewise, why is the pancreas retroperitoneal? Although the pancreas is a retroperitoneal organ, because of its unique embryologic development it maintains a close relationship with the peritoneum and its ligaments and organs connected to the mesentery. Just so, what does secondarily retroperitoneal mean? Structures that lie behind the peritoneum are termed “retroperitoneal”. Organs that were once suspended within the abdominal cavity by mesentery but migrated posterior to the peritoneum during the course of embryogenesis to become retroperitoneal are considered to be secondarily retroperitoneal organs.Which part of the pancreas is intraperitoneal?Tail – the left end of the pancreas that lies within close proximity to the hilum of the spleen. It is contained within the splenorenal ligament with the splenic vessels. This is the only part of the pancreas that is intraperitoneal.

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