The mediastinum contains all of the chest organs except the lungs. Organs located in the mediastinum include the heart, the aorta, the thymus gland, the chestportion of the trachea, the esophagus, lymph nodes and important nerves.
Organs of the abdominal cavity include the stomach, liver,gallbladder, spleen, pancreas, small intestine, kidneys, largeintestine, and adrenal glands.
The pelvic cavity is a body cavity that is bounded by the bones of the pelvis. Its oblique roof is the pelvic inlet (the superior opening of the pelvis). Its lower boundary is the pelvic floor. The pelvic cavity primarily contains reproductive organs, the urinary bladder, the pelvic colon, and the rectum.