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Carnegie Stage Section
T-4 spinal ganglion, apex of heart, auricle of left atrium, digit tip, head of rib 5, left atrioventricular (mitral) valve, olecranon process of ulna, pericardial cavity, peritoneal cavity, pleural cavity, primary bronchus, right atrioventricular (tricuspid) valve, right phrenic nerve, sympathetic trunk, upper lobe of left lung, upper lobe of right lung
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Carnegie Embryo #4090   |   Location: 16-9

Keywords: T-4 spinal ganglion, apex of heart, auricle of left atrium, digit tip, head of rib 5, left atrioventricular (mitral) valve, olecranon process of ulna, pericardial cavity, peritoneal cavity, pleural cavity, primary bronchus, right atrioventricular (tricuspid) valve, right phrenic nerve, sympathetic trunk, upper lobe of left lung, upper lobe of right lung

Source: The Virtual Human Embryo.