. . . . "the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus"@en-us . "05324691-n"^^ . . "the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus"@en-us . "0"^^ . . . "105324691"^^ . "0"^^ . . "mediastinum"@en-us . . . . "105017816"@en-us . . . . "mediastinum"^^ . . .