Click image to view full screen
Observe the large intestine which has three parts:
Follow the ileum distally [indicated by probe] to the point where it becomes continuous with the cecum [indicated by probe], the first part of the large intestine.
Identify the vermiform appendix which normally hangs from the base of the cecum into the abdominal or pelvic cavity.
The vermiform appendix usually has its own mesentery, except where the entire cecum (with vermiform appendix) does not possess a mesentery and is located, therefore, in the retroperitoneal space. In this situation the vermiform appendix is usually located in retrocecal position.
Links and References: