1 68 



ELEMENTS of HISTOLOGY. [chap. xx. 



(perineural) sheath. The small and large branches 

 form always rich plexuses. 



224. In connection with the macroscopic and 

 microscopic sympathetic nerve-branches, are gang- 

 1 ionic enlargements. They occur in some organs very 

 numerously e.g., alimentary canal, urinary bladder 



(Fig. 97 and Fig. 

 98), respiratory or- 

 gans and are of 

 all sizes, from a 

 few ganglion cells 

 placed between, or 

 laterally to, the 

 nerve-fibres of a 

 small bundle, to 

 oval, spherical, or 

 irregularly - shaped 

 masses of ganglion 

 cells placed in the 

 course of a large 

 nerve - bundle, or 

 situated at the point 

 of anastomosis of 

 two or more nerve- 

 branches. 



The ganglion 

 cells (Fig. 99) are 

 of very different 

 sizes, each possess- 

 ing a large oval or 

 spherical nucleus 



Fig. 99.-Sympathetie Ganglion Cell of Man. W ^ n ? L, tA T 

 me ganglion cell is multipolar; each process re- HUCleoll. 



ceivinsra neurileiuma from the capsule of the 



cell becomes a non-iucdullatednerve-flnre. (Key 



and Retziua.) 



flask- 



IQ 

 IS 



or oval, 



shaped, club-shaped, or pear-shaped; they possess 

 either one, two, or more processes, being uni-, bi-, 



