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Thoracic Cavity: heart, lungs, esophagus, thymus , sympathetic trunk, and the great vessels
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Cranial Cavity: cranial bones and brain
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Abdominal Cavity: stomach, spleen, liver, gallbladder, small intestine, large intestine, and peritoneum
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Pelvic Cavity: urinary bladder, rectum, and reproductive organs
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Mediastinum: heart, thymus, esophagus, trachea, several large blood vessels, and central portion of thoracic cavity between the lungs