![](/drem/stage21/labels2/S73L.gif)
![artifact space(s), cerebral aqueduct (mesocoele), choroid plexus, diverticulum of rhombencoel (fourth ventricle), edge of myelencephalon, middle dural venous plexus, pons region (metencephalon), posterior cerebral artery, rhombencoel (fourth ventricle), sulcus limitans, trochlear nerve (CN IV), venous plexus(es)](/drem/stage21/Z0/S73N.jpg)
![](/drem/rulerbg.png)
0 μm
Carnegie Embryo #4090 | Location: 4-15
Keywords: artifact space(s), cerebral aqueduct (mesocoele), choroid plexus, diverticulum of rhombencoel (fourth ventricle), edge of myelencephalon, middle dural venous plexus, pons region (metencephalon), posterior cerebral artery, rhombencoel (fourth ventricle), sulcus limitans, trochlear nerve (CN IV), venous plexus(es)
Source: The Virtual Human Embryo.