The abdominopelvic cavity is a body cavity that consists of the abdominal cavity and the pelvic cavity. It contains the stomach, liver, pancreas, spleen, gallbladder, kidneys, and most of the small and large intestines. It also contains the urinary bladder and internal reproductive organs. The abdominal pelvic cavity is a little pocket sac that lies way low in the base of the abdominal pelvis cavity. There's no membrane that separates out the abdominal cavity from the pelvic cavity so it is sometimes referred to as the abdominal pelvis or the peritoneal cavity. There are many diseases and disorders associated with the organs of the abdominopelvic cavity.