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			Carnegie Embryo #4430   |   Location: 3-11
		
	
		Keywords: cephalic edge of osteogenic layer, cerebral aqueduct (mesencoel), external cerebellum, head mesenchyme, intermediate zone, internal cerebellum, marginal zone, rhombencoel (fourth ventricle), trochlear nerve (CN IV), ventricular zone
Source: The Virtual Human Embryo.

 
	
	
	