![](/drem/stage17/labels2/S56L.gif)
![alar plate(s), continuity of surface ectoderm, mesencephalon (M2), mesencoel (cerebral aqueduct), myelencephalon, roof plate, vascular plexus](/drem/stage17/Z0/S56N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #6520 | Location: 4-03-01
Keywords: alar plate(s), continuity of surface ectoderm, mesencephalon (M2), mesencoel (cerebral aqueduct), myelencephalon, roof plate, vascular plexus
Source: The Virtual Human Embryo.