NERVOUS SYSTEM. 35 



filaments. It supplies the stomach, intestines, liver, pancreas, 

 spleen and kidneys. An injury to the solar plexus is always 



FIG. 18. RELATION OF THE SYMPATHETIC AND CEREBRO-SPI N AL 



SYSTEMS. PARTLY DIAGRAMMATIC. 



1, Brain; 2, spinal cord; 3, sympathetics. 



Sympathetic nerves. — These control in part involuntary mus- 

 cle fibers and through these the organs of circulation, respiration, 

 and digestion, and in part the work of the various glands includ- 

 ing the liver, spleen, pancreas, and kidneys. Sympathetic nerves 

 are gray ; cerebro-spinal nerves are white. 



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