![](/drem/stage18/labels2/S118L.gif)
![cerebral peduncle, diverticulum of rhombencoel (fourth ventricle), head mesenchyme, intermediate zone, interpeduncular fossa, marginal zone, mesencephalon, osteogenic layer, rhombencoel (fourth ventricle), subarachnoid space, surface ectoderm, vascular plexus, ventricular zone](/drem/stage18/Z0/S118N.jpg)
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Carnegie Embryo #4430 | Location: 4-12
Keywords: cerebral peduncle, diverticulum of rhombencoel (fourth ventricle), head mesenchyme, intermediate zone, interpeduncular fossa, marginal zone, mesencephalon, osteogenic layer, rhombencoel (fourth ventricle), subarachnoid space, surface ectoderm, vascular plexus, ventricular zone
Source: The Virtual Human Embryo.