![](/drem/stage12/labels/S99L.gif)
![aortic arch 1, aortic arch 2, dorsal aorta, ectodermal ring, head mesenchyme, median mandibular groove, notochord, pharyngeal membrane 2, pharyngeal pouch 2, pharynx](/drem/stage12/Z0/S99N.jpg)
![](/drem/rulerbg.png)
0 μm
Carnegie Embryo #8943 | Location: 03-01-07
Keywords: aortic arch 1, aortic arch 2, dorsal aorta, ectodermal ring, head mesenchyme, median mandibular groove, notochord, pharyngeal membrane 2, pharyngeal pouch 2, pharynx
Source: The Virtual Human Embryo.