Final answer:
Certain organs can be classified as intraperitoneal or retroperitoneal based on their position in the abdomen. Intraperitoneal organs are completely surrounded by the peritoneum, while retroperitoneal organs are partially or completely located behind the peritoneum.
Step-by-step explanation:
When classifying organs based on their location in the abdomen, some organs are classified as intraperitoneal while others are classified as retroperitoneal. The main difference between these two classifications is the position of the organs in relation to the peritoneum. Intraperitoneal organs are completely surrounded by the peritoneum, while retroperitoneal organs are partially or completely behind the peritoneum. For example, the duodenum, pancreas, and parts of the large intestine are retroperitoneal organs.