1028 



THE NERVOUS SYSTEM 



abundant in and largely comprise the viscera or splanchnic organs of the body, 

 the largest and most evident of the structures comprising the sympathetic system 

 are found either in or near the cavities containing the viscera. However, the 



Fig. 784. — Scheme showing General Plan of the Coarser Portions of the Sympa- 

 thetic Nervous System and its Principal Communications with the Cerebro-spinal 

 System. (After Flower, modified.) 



faver/tous p/exu s 



JZ' 



M' 



3'- 



Coccygeal ncrre 



" Aidominal Aortic pie jus 



IlYPOCASmiC PLEXUS 



Ganglion Coccggeura impar 



finer divisions of the system ramify tliroughout the whole body, supplying vaso- 

 motor fibres to the blood-vessels throughout their course, controlling the glands 

 of the skin, and supplyiiij? i)ilo-m()tor fibres for the hairs, forming intrins^/i^ 

 plexuses within the walls of th e vis cera, and it is claimed that a few of its neurones 



