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              accessory nerve(cranial nerve XI)
               基礎(chǔ)科學(xué) 
              
				
              

										 
                      One ofthe pair of nerves that arises from the posteri-or region of the medulla oblongata in thebrain of higher vertebrates. It carries motornerve fibers and merges with the adjacent va-gus nerve close to its root. In fishes and am-phibians it is considere......（本文共 353 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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