a. Thoracic cavity: heart (and other cardiovascular organs), lungs (and other respiratory organs), esophagus, thymus, and several large blood vessels
b. Cranial cavity: brain
c. Abdominal cavity: stomach, liver, spleen, gallbladder, small intestine, most of the large intestine
d. Pelvic cavity: urinary bladder, portions of the large intestine, pelvic colon, urethra, reproductive organs
e. Mediastinum: thymus, heart, trachea, esophagus