![](/drem/stage13/labels2/S61L.gif)
![aortic arch 2, aortic arch 3, dorsal aorta, pharynx primordium, precardinal vein, primary head vein, region of mesencephalic (cephalic) flexure](/drem/stage13/Z0/S61N.jpg)
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Carnegie Embryo #836 | Location: 04-02-05
Keywords: aortic arch 2, aortic arch 3, dorsal aorta, pharynx primordium, precardinal vein, primary head vein, region of mesencephalic (cephalic) flexure
Source: The Virtual Human Embryo.