![left umbilical artery, left umbilical vein, notochordal (primitive) pit, right umbilical artery, right umbilical vein, tail fold region](/drem/stage9/Z1/S129Z1.jpg)
![](/drem/rulerbg.png)
0 μm
Carnegie Embryo #3709 | Location: 02-03-04
Keywords: left umbilical artery, left umbilical vein, notochordal (primitive) pit, right umbilical artery, right umbilical vein, tail fold region
Source: The Virtual Human Embryo.