Smooth 



muscle Type II 



THE SYMPATHETIC SYSTEM. 



-- Somatic motor 

 \\V I I 



General cutaneous 



Visceral sensory 



Visceral motor 

 Sympathetic 



^rNr Dorsal root 



^---Spin.gangl. 

 Dors, ramus. 



209 



Ven. ramus 

 Blood vessel 



Chain 

 ganglion. 



Gland 



Periph. g. 

 Bl.v. 



Sens, ending 

 Pacinian 

 corpuscle 



Fig. 1 08. 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 



