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Carnegie Stage Section
T-3 spinal ganglion, arch of azygos vein, ascending aorta, body of sternum, brachial artery, descending aorta, humerus, left atrium, left vagus nerve (CN X), mammary gland, neural arch of T-3 vertebra, pectoralis major muscle, pectoralis minor muscle, pleural cavity, posterior intercostal artery, proximal phalynx of digit 4 (ring finger), radius, rib 3, rib 3 (costal cartilage), right atrium, subcutaneous tissue, superior vena cava, surface ectoderm, transverse process of T-3 vertebra, ulna, upper lobe of left lung
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Carnegie Embryo #9226   |   Location: 105-01-01

Keywords: T-3 spinal ganglion, arch of azygos vein, ascending aorta, body of sternum, brachial artery, descending aorta, humerus, left atrium, left vagus nerve (CN X), mammary gland, neural arch of T-3 vertebra, pectoralis major muscle, pectoralis minor muscle, pleural cavity, posterior intercostal artery, proximal phalynx of digit 4 (ring finger), radius, rib 3, rib 3 (costal cartilage), right atrium, subcutaneous tissue, superior vena cava, surface ectoderm, transverse process of T-3 vertebra, ulna, upper lobe of left lung

Source: The Virtual Human Embryo.