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Carnegie Stage Section
T-4 dorsal primary ramus, T-4 spinal ganglion, T-4 ventral primary ramus (intercostal nerve), aortic semilunar valve, brachial artery, humero-ulnar joint, intermediate phalynx of digit 4 (ring finger), left atrium, left primary bronchus, musculi pectinati, pleural cavity, posterior intercostal artery, rib 3 (costal cartilage), rib 4, right anterior segmental bronchus of upper lobe, right atrium, right posterior segmental bronchus of upper lobe, right primary bronchus, right upper lobe bronchus, right ventricle, sternocostal joint, superior vena cava, transverse pericardial sinus, upper lobe of left lung, upper lobe of right lung
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Carnegie Embryo #9226   |   Location: 112-01-01

Keywords: T-4 dorsal primary ramus, T-4 spinal ganglion, T-4 ventral primary ramus (intercostal nerve), aortic semilunar valve, brachial artery, humero-ulnar joint, intermediate phalynx of digit 4 (ring finger), left atrium, left primary bronchus, musculi pectinati, pleural cavity, posterior intercostal artery, rib 3 (costal cartilage), rib 4, right anterior segmental bronchus of upper lobe, right atrium, right posterior segmental bronchus of upper lobe, right primary bronchus, right upper lobe bronchus, right ventricle, sternocostal joint, superior vena cava, transverse pericardial sinus, upper lobe of left lung, upper lobe of right lung

Source: The Virtual Human Embryo.