![](/drem/stage12/labels2/S222L.gif)
![amnion, amnion attachment, amniotic cavity, caudal edge of pericardial cavity, dermatomyotome 6 (C-2), dorsal aorta, extra-embryonic coelom, junction of hepatic and umbilical veins, left umbilical vein, left vitelline (omphalomesenteric) vein, notochord, peritoneal cavity, right umbilical vein, right vitelline (omphalomesenteric) vein, septum transversum](/drem/stage12/Z0/S222N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #8943 | Location: 05-03-10
Keywords: amnion, amnion attachment, amniotic cavity, caudal edge of pericardial cavity, dermatomyotome 6 (C-2), dorsal aorta, extra-embryonic coelom, junction of hepatic and umbilical veins, left umbilical vein, left vitelline (omphalomesenteric) vein, notochord, peritoneal cavity, right umbilical vein, right vitelline (omphalomesenteric) vein, septum transversum
Source: The Virtual Human Embryo.