单词	thoracic cavity
释义	thoracic cavity noun plural thoracic cavities : the cavity of the thorax (see thorax sense 1) that is bounded below by the diaphragm, is enclosed by the sternum, ribs, and thoracic vertebrae, and that contains the heart and lungs … an inflammation of the thoracic cavity which feels like a burning stiffness of the muscles … Harold Brodky Word History First Known Use 1779, in the meaning defined above Medical Definition thoracic cavity noun : the division of the body cavity that lies above the diaphragm, is bounded peripherally by the wall of the chest, and contains the heart and lungs
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