mediastinum

(mee-dee-a-STYE-num) The area between the lungs. The organs in this area include the heart and its large blood vessels, the trachea, the esophagus, the bronchi, and lymph nodes.

(mee-dee-uh-STYE-nim): The part of the body between the lungs. The heart, windpipe, esophagus, bronchi, and lymph nodes are found in this area.