![](/drem/stage17/labels/S240L.gif)
![C-1 spinal nerve, C-2 spinal ganglion, C-3 spinal ganglion, anterior semicircular duct, basilar artery, facial nerve (CN VII), hypoglossal canal, intermediate zone, lateral semicircular duct, marginal zone, median sulcus, posterior communicating artery, precardinal vein, primary head vein, tectum, tegmentum, trigeminal ganglion (CN V), utriculosaccular diverticulum, ventricular zone, vertebral artery, vestibulocochlear ganglion (CN VIII)](/drem/stage17/Z0/S240N.jpg)
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Carnegie Embryo #6520 | Location: 7-04-01
Keywords: C-1 spinal nerve, C-2 spinal ganglion, C-3 spinal ganglion, anterior semicircular duct, basilar artery, facial nerve (CN VII), hypoglossal canal, intermediate zone, lateral semicircular duct, marginal zone, median sulcus, posterior communicating artery, precardinal vein, primary head vein, tectum, tegmentum, trigeminal ganglion (CN V), utriculosaccular diverticulum, ventricular zone, vertebral artery, vestibulocochlear ganglion (CN VIII)
Source: The Virtual Human Embryo.