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Carnegie Stage Section
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T-2 spinal ganglion, T-3 / T-4 intervertebral disc, auricle of left atrium, auricle of right atrium, ductus arteriosus, interventricular sulcus, left ventricle, rhomboid major muscle, rib 3, right ventricle, subarachnoid space, superior vena cava, sympathetic trunk, ulna, ulnar nerve
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Carnegie Embryo #4090   |   Location: 15-5

Keywords: T-2 spinal ganglion, T-3 / T-4 intervertebral disc, auricle of left atrium, auricle of right atrium, ductus arteriosus, interventricular sulcus, left ventricle, rhomboid major muscle, rib 3, right ventricle, subarachnoid space, superior vena cava, sympathetic trunk, ulna, ulnar nerve

Source: The Virtual Human Embryo.