This is the space between the parietal and visceral peritoneum. It is space which invaginates intraperitoneal structures such as liver, stomach, small intestine etc which are then said to be intraperitoneal; i.e. lying in the peritoneal cavity. These structures have their attachments to the posterior abdominal wall, excepting the stomach and esophagus which loose these connections during embryological development. The structures are covered by the two layers of peritoneum excepting at their back where they are attached to the posterior abdominal wall in the abdomen. In the pelvis they project upwards into the peritoneal cavity while anchoring in the perineum or pelvic wall.
|Main peritoneal cavity or greater sac of peritoneum|
|Omental bursa or lesser sac of peritoneum|
These two are further subdivided to form peritoneal spaces and pouches most especially the main peritoneal cavity which is further divided into
2. Right subhepatic space. This is placed behind the right lobe of liver. It is also called the pouch of Morrison.
Both are subphenic spaces are placed behind the diaphragm and may be extremely difficult to access surgically.
Other smaller spaces are as follows
|Elementary dissector||Advanced dissector|
Peritoneal cavity 1- 3D model
Peritoneal cavity 2- 3D model