THE HIGHER ORGANISMS 



151 



Neuraxis 



Medullary sheath - 



Nucleus of 

 neurilemma 



Motor ending 



Dendrite 



Collateral branch 

 Neurilemma 



Node of Ranvier 



Axis-cylinder of 



medullated 

 nerve-fiber 



Muscle-fibers 



' FIG. 55. Diagram of peripheral motor neurone, showing the specialized 

 contractile tissue, the muscle, the specialized conducting tissue, the nerve fibre, 

 with the motor endings in the muscle, and the source of the stimulation, the 

 nerve cell. (Bohm, Davidoff and Huber.) 



