The mediastinum is the part of the thoracic cavity that contains the lung, the heart and its major blood vessels, the trachea, the thymus gland, and the esophagus. False lungs are located outside of the mediastinum.
Erlendr was a Nord warrior. He is a hero, and his ghost can be found inside the Hall of Valor in Sovngarde. He, along with Nikulas and Hunroor, was turned into a stone pillar at Brodir Grove by the wizard Grimkell while searching for Sovngarde. Ulfgar the Unending later avenged them by killing Grimkell.
Dr. Donald Westphall. Kindly Dr. Westphall was Director of Medicine at St. Eligius, the hospital that served as St. Elsewhere's setting, and was regarded as its heart, who was one of the two principal characters of the series. He was the one other characters went to for a kindly word and a pat on the back.