. Thoracic cavity - heart, lungs, thymus, trachea, esophagus
b. Cranial cavity - brain
c. Abdominal cavity - stomach, small spleen, small intestine, large intestine, liver, gallbladder
d. Pelvic Cavity - urinary bladder, reproductive organs
e. Mediastinum - heart, esophagus, trachea, blood vessels