![](/drem/stage23/labels/S8L.gif)
![cerebral aqueduct (mesocoele), dural limiting membrane, loose connective tissue, mesencephalon (tectum), osteogenic layer, subarachnoid space, subcutaneous vascular plexus, surface ectoderm, venous plexus(es)](/drem/stage23/Z0/S8N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #9226 | Location: 8-01-01
Keywords: cerebral aqueduct (mesocoele), dural limiting membrane, loose connective tissue, mesencephalon (tectum), osteogenic layer, subarachnoid space, subcutaneous vascular plexus, surface ectoderm, venous plexus(es)
Source: The Virtual Human Embryo.