Till. PR0PRRTI1 - OP I \« II PART OP Till Kl III X \l:< 





THE NERVE CELL 



Aside Prom being a meeting place of fibers coming from various 

 sources, the nervi II may have other functions, such as that of rein- 

 forcing impulses, jusl as a relay may reinforce an electric current It 

 is also responsible for maintaining the nutrition of the axon with which 

 it is connected. In the case of the posterior rool fibers of higher ani- 



Pig, 208. Normal cell from the anterior horn, stained to show N 



( Prom 1 1' ■» ell. > 



mala, this function is probably the must importanl which the cell | 

 forma, for it has been found by separating the ganglia from their bli 

 supply in the frog that, although the cells degenerate in about two 

 weeks, Bensory impulses continue to be transmitted through the gan- 

 glia, similar observations have I »«•«■! 1 made in tl • of the crab, in 

 which the '•••11 bodies of the neurons lie <>n the surfa the ganglion 



