ClipArt ETC
Diagram of a transverse section of the thorax. Labels: 1, anterior mediastinum; 2, internal mammary vessels; 3, triangularis sterni muscle; 4, right phrenic nerve between pleura and pericardium; 5, left phrenic nerve between the pleura and pericardium; 6, thoracic duct in posterior mediastrinum; 7, esophagus with left vagus in front and right vagus behind; 8, vena azygos major; 9, thoracic aorta giving off intercostal arteries; 10, gangliated cord of sympathetic; R.V., right ventricle; R.A., right auricle of heart in middle mediastinum; P.A., pulmonary artery; A., aorta; C., vena cava superior; V. dorsal vertebra.

The Thorax

Diagram of a transverse section of the thorax. Labels: 1, anterior mediastinum; 2, internal mammary…