![](/drem/stage12/labels2/S27L.gif)
![mesencephalon (M2), mesencoel, rhombencephalon (Rh. 1), rhombencephalon (Rh. 2), rhombencoel (fourth ventricle), roof plate, surface ectoderm, trigeminal neural crest (CN V)](/drem/stage12/Z0/S27N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #8943 | Location: 01-04-05
Keywords: mesencephalon (M2), mesencoel, rhombencephalon (Rh. 1), rhombencephalon (Rh. 2), rhombencoel (fourth ventricle), roof plate, surface ectoderm, trigeminal neural crest (CN V)
Source: The Virtual Human Embryo.