mediastinum definition

  • noun:
    • The region in mammals between the pleural sacs, containing the center and all sorts of of this thoracic viscera except the lung area.
    • The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.
    • In anatomy, a median septum or partition between two components of an organ, or between two paired cavities regarding the human anatomy; specially, the membranous partition separating the right and left thoracic cavities, created of the two inner pleural wall space.
    • the an element of the thoracic cavity amongst the lung area which contains the heart and aorta and esophagus and trachea and thymus

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