![](/drem/stage23/labels/S10L.gif)
![cerebral aqueduct (mesocoele), mesencephalon (tectum), osteogenic layer, subarachnoid space, subcutaneous vascular plexus, surface ectoderm, venous plexus(es)](/drem/stage23/Z0/S10N.jpg)
![](/drem/rulerbg.png)
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Carnegie Embryo #9226 | Location: 10-01-01
Keywords: cerebral aqueduct (mesocoele), mesencephalon (tectum), osteogenic layer, subarachnoid space, subcutaneous vascular plexus, surface ectoderm, venous plexus(es)
Source: The Virtual Human Embryo.