-Olfactory Nerve 

 .OlFactovy Lobe 



Cerebrum 



-Optic Nerve 



FiftK Nerve 



-Mid -brain 



-Seventh and 



LEi^th nerves 



XevebcHui-n. 

 -Medulla 



-Ninth and 

 Tenth neives 



Spinal cord. 



CCLaoM 



A-s. a^^ 



Figure 52. The brain and anterior part of the spina! cord 

 of a salamander. The region marked cerebrum is the part that 

 develops into the huge cerebrum of man. Notice that no nerves 

 enter this part of the brain and the same is true for the brain 

 of man. The nerve marked optic nerve enters the midbrain 

 region. Compare the specialization and concentration of nervous 

 tissue in this brain, which is one of the simplest of the vertebrates, 

 with the one shown in Figure 49. 



