![](/drem/stage9/labels2/S56L.gif)
![intra-embryonic coelom, notochordal plate, primordial left dorsal aorta, primordial otic placode, primordial right dorsal aorta, rhombomere A (Rh. A), rhombomere B (Rh. B), rhombomere C (Rh. C)](/drem/stage9/Z0/S56N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #3709 | Location: 01-05-09
Keywords: intra-embryonic coelom, notochordal plate, primordial left dorsal aorta, primordial otic placode, primordial right dorsal aorta, rhombomere A (Rh. A), rhombomere B (Rh. B), rhombomere C (Rh. C)
Source: The Virtual Human Embryo.