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Carnegie Stage Section
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T-3 / T-4 interganglion region, aorta, auricle of left atrium, auricle of right atrium, azygos vein, digits (fingers), lower lobe of left lung, muscular part of interventricular septum, olecranon process of ulna, pericardial sac, pulmogenic coat, radius, rib 4, rib 5, rib 6, sinus venosus, subarachnoid space, sympathetic trunk, ulnar nerve, upper lobe of left lung
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Carnegie Embryo #4090   |   Location: 16-5

Keywords: T-3 / T-4 interganglion region, aorta, auricle of left atrium, auricle of right atrium, azygos vein, digits (fingers), lower lobe of left lung, muscular part of interventricular septum, olecranon process of ulna, pericardial sac, pulmogenic coat, radius, rib 4, rib 5, rib 6, sinus venosus, subarachnoid space, sympathetic trunk, ulnar nerve, upper lobe of left lung

Source: The Virtual Human Embryo.