Retroperitoneal space

Spatium retroperitoneale · Retroperitoneální prostor

Fascia & connective tissue

Looks like

The space behind the peritoneal lining at the back of the belly, holding the kidneys, aorta, vena cava, pancreas and parts of the bowel.

Keeps these organs fixed against the back wall and protected by the spine and back muscles.

Bleeding here, from a leaking aortic aneurysm or after injury, can be hidden; sudden back or flank pain with faintness is an emergency.