THE SYMPATHETIC SYSTEM 



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FIG. 29. Vegetative in nervation of the viscera. 



In this picture the nervous axis and the viscera are shown diagramatically. In the head is 

 shown the lacrymal gland (L.), the mucous glands of the nose (N. G.), the parotid (Pa.), 

 The submaxillary and sublingual glands (S.). The cerebral portion of the axis controls these 

 glands as well as a portion of the eye; Sphincter of the iris and ciliary muscle (Sp. M. cil.). 

 The lungs (Lu.), the heart (H.), the stomach (St.). the liver (L.) the pancreas (P.), the 

 small intestines are innervated by the vagus (X), while the large intestines, the bladder (B.) 

 are innervated by the pelvic plexus. All the nerves belonging to the cranial pelvic system are 



represented by a solid line , while those of the thoracic lumbar 



or true sympathetic system are represented by a dotted line 



The true sympathetic innervation is drawn very sketchily and for further details see fig. 27. 

 This diagram however shows the uro-digestive sphincter innervation of this system. The 

 various dots, scattered in the viscera indicate autonomous systems. 



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