thoracic aorta | aortic arch  |  left subclavian artery |  left common carotid artery   |  brachiocephalic artery   | left pulmonary arteryright pulmonary artery | trachea | esophagus. |  right primary bronchus and secondary bronchi | azygous vein  | left primary bronchus  |  left pulmonary artery | left pulmonary veins | great coronary vein  | right pulmonary veins  | inferior vena cava