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Thoracic Cavity – It contains pleural cavities, pericardial cavities, and mediastinum.
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Cranial Cavity – It includes cranial bones and the brain.
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Abdominal Cavity – It consists of the stomach, spleen, liver, gallbladder, small intestine, and most of the large intestine.
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Pelvic Cavity - It composes of the urinary bladder, portions of the large intestine, and internal organs of reproduction.
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Mediastinum - It comprises the heart, thymus, esophagus, trachea, and several large blood vessels.