Keywords: T-4 / T-5 interganglion region, aorta, azygos vein, central tendon of heart, dorsal median septum, esophagus, intermediate phalynx of digit 2 (index finger), internal thoracic artery, lateral tertiary bronchus, left atrium, left phrenic nerve, left upper pulmonary vein, lower lobe of left lung, lower lobe of right lung, medial tertiary bronchus, metacarpal 5, middle lobe of right lung, middle secondary bronchus, oblique fissure, primary interatrial septum (septum primum), proximal interphalangeal joint of digit 3 (middle finger), rib 5, rib 6, rib 7, right atrium, right phrenic nerve, right upper pulmonary vein, sinus venosus, trabecular part of left ventricle, trapezius muscle, ulna, upper lobe of left lung
Source: The Virtual Human Embryo.