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Thoracic cavity - heart, lungs, esophagus, trachea, thymus
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Cranial cavity - brain
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Abdominal cavity - stomach, spleen, liver, gallbladder, small intestine, and most of the large intestine
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Pelvic Cavity - urinary bladder, parts of the large intestine, internal organs of the reproductive system
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Mediastinum - heart, trachea, esophagus, thymus gland