THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The area in the back of the abdomen behind the peritoneum (the tissue that lines the abdominal wall and covers most of the organs in the abdomen). The organs in the retroperitoneum include the adrenal glands, aorta, kidneys, esophagus, ureters, pancreas, rectum, and parts of the stomach and colon.

Detailed explanation-2: -The Kidneys Are Retroperitoneal Organs in the Abdomen The kidneys are located behind the peritoneum, and so are called retroperitoneal organs. They sit in the back of the abdomen between the levels of the T12 and L03 vertebrae. The right kidney is slightly lower than the left kidney to accommodate the liver.

Detailed explanation-3: -The retroperitoneal cavity is the space located behind the intraperitoneal space where the kidneys are located. The retroperitoneal space contains the kidneys, adrenal glands, pancreas, nerve roots, lymph nodes, abdominal aorta, and inferior vena cava.