i66 



ELEMENTS OF HISTOLOGY. [Chap. xx. 



soon connected with a nerve-fibre. At the back 

 of the tongue there are similar small microscopic 

 ganglia. 



CHAPTER XX. 



THE SYMPATHETIC SYSTEM. 



223. THE sympathetic nerve-branches exactly re- 

 semble the cerebro-spinal nerves in their connective 

 tissue investments (epi- peri- and endo-neurium), and 



Fig. 96. Sympathetic Nerves. 



A, A small bundle invested in an endothelial sheath perinenrium ; B, one 

 medullati'd and three non-medullatod nerve-fibres of various sizes; the 

 largest shows division ; c, two varicose nerve-fibres. (Atlas.) 



in the arrangement of the fibres in bundles (Fig. 

 96, A). Most of the nerve-fibres in the bundles are 

 non-medullated or Remak's fibres (Fig. 96, B), each 



