THE SYMPATHETIC SYSTEM. 



« Somatic motor 



209 



Smooth 



muscle Type II 



General cutaneous 

 Visceral sensory 

 Visceral motor 

 Sympathetic 



Dorsal root 



g W^- 



Chain 

 ganglion. 



Sens, ending 

 Pacinian 

 corpuscle 



Fig. 108. — A diagram of the sympathetic system and the arrangement of its neu- 

 rones in a mammal. On the left are shown the typical elements of a trunk segment 

 including the sympathetic system. On the right are shown only the somatic afferent 

 and efferent neurones of the spinal nerve. Of the sympathetic system are shown 

 the white and gray rami, three ganglia of the chain, one prevertebral ganglion and 

 one peripheral ganglion. The symbols used are explained in the figure. In most 

 respects the diagram follows one of Huber's figures. 



14 



