![](/drem/stage12/labels2/S131L.gif)
![cephalic edge of dermatomyotome 3 (O-3), cephalic edge of right atrium, conus cordis, dorsal aorta, endocardium, epimyocardium, left atrium, notochord, pharyngeal pouch 4, truncus arteriosus](/drem/stage12/Z0/S131N.jpg)
![](/drem/rulerbg.png)
0 μm
Carnegie Embryo #8943 | Location: 03-04-09
Keywords: cephalic edge of dermatomyotome 3 (O-3), cephalic edge of right atrium, conus cordis, dorsal aorta, endocardium, epimyocardium, left atrium, notochord, pharyngeal pouch 4, truncus arteriosus
Source: The Virtual Human Embryo.