|  | tail dorsal root ganglion | 
|  | vertebral axis musculature | 
|  | lower lip | 
|  | head mesenchyme | 
|  | midbrain mantle layer | 
|  | upper lip | 
|  | pons ventricular layer | 
|  | vibrissa | 
|  | limb | 
|  | pons marginal layer | 
|  | nasal cavity olfactory epithelium | 
|  | hypothalamus mantle layer | 
|  | tongue mesenchyme | 
|  | tail | 
|  | medulla oblongata basal plate ventricular layer | 
|  | midbrain ventricular layer | 
|  | rest of cerebellum ventricular layer | 
|  | trigeminal V ganglion | 
|  | telencephalon ventricular layer |