Henry Gray (18251861). Anatomy of the Human Body. 1918.
and the upper half of the superior vena cava; the left highest intercostal vein; the vagus, cardiac, phrenic, and left recurrent nerves; the trachea, esophagus, and thoracic duct; the remains of the thymus, and some lymph glands.
FIG. 967 Transverse section through the upper margin of the second thoracic vertebra. (Braune.) (See enlarged image)
FIG. 968 A transverse section of the thorax, showing the contents of the middle and the posterior mediastinum. The pleural and pericardial cavities are exaggerated since normally there is no space between parietal and visceral pleura and between pericardium and heart. (See enlarged image)