THE NERVOUS SYSTEM 



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filaments. It is generally admitted that the nerves that 

 emerge from the ganglia are larger than those that enter 

 them as if the ganglia imparted additional power to the 



nerve. 



FIG. 107. Transverse section of a nerve : a, Epineurium ; b, perineurium ; 

 c, endoneurium ; d, section of a single fiber (Leroy). 



The branches of distribution accompany the arteries 

 that supply the different organs and form communica- 

 tions around them; these are called plexuses, and take the 

 name of the artery with which they are associated. Thus 



FIG. 1 08. Nerve-cell with dendrites ending in claw-like telodendria: 

 a, Neuraxis; b, telodendrion (Bohm and Davidoff). 



we have the mesenteric plexus, the hepatic plexus, the 

 splenic plexus, etc. All the internal organs of the head, 

 neck, and trunk are supplied with branches from the 

 sympathetic nerve, and some of them exclusively. This 



