A. Thoracic cavity - Lungs, Heart, (vessels, arteries, veins)
B. Cranial Cavity - Brain, meninges of the brain, cerebrospinal fluid
C. Abdominal Cavity - Liver, pancreas, spleen, kidneys, stomach, small and large intestines
D. Pelvic Cavity - Urinary bladder, portion of large intestine, internal organs of reproduction
E. Mediastinum - Heart, thymus gland, portions of esophagus and trachea