THE NERVOUS SYSTEM 



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lower dorsal and upper four lumbar nerves, and have their 

 cell stations in the inferior mesenteric ganglia, from which 

 they run in the hypogastric nerves to the pelvic ganglia. 



Head. 



Thorax. 



Abdomen. 



D.I 



2. 



5 

 4 

 S 



6 



1 



Pelvis. 



FIG. 76. Scheme of distribution of Splanchnic Nerves. 



They are vaso-constrictor, inhibitory to the colon, and motor 

 to the bladder, uterus and vagina and the retractor 

 penis. 



5. Arm. These fibres, coming out by the fourth to the 

 tenth dorsal nerves, have their synapses in the sympathetic 

 ganglia of the sympathetic chain, and passing back into the 



10 



