Peritoneal reflections

Parietal peritoneum - layers lining the surface walls 

Visceral peritoneum - layer that covers a larger continuous layer like pleura 

Retroperitoneal - situated outside the peritoneum in contact with body wall 

Intraperitoneal - suspended from the abdo wall by a double layered fold of peritoneum

Intraperitoneal organs	Secondary retroperitoneal (lost a mesentery)	Primary retroperitoneal (never had a mesentery)
Stomach Liver Gallbladder Spleen Duodenum 1st part Tail of pancreas Jejunum Ileum Appendix  Transverse colon Sigmoid colon	Duodenum 2nd + 3rd part Head, neck & body of pancreas Ascending colon Descending colon Upper rectum	Kidneys Adrenal glands Ureters Aorta IVC Lower rectum