220 



THE NERVOUS SYSTEM. 



mucous membranes, voluntary muscle, and doubtless in many 

 other situations. 



In the epidermis fibrils enter from the corium and are dis- 

 tributed among the cells of the Malpighian layer. Similar 

 endings have been found in the epithelium of the mucous mem- 



FIG. 



Terminal nerve-fibrils in epithelium of mucous membrane (bladder of rabbit) 



(Retzius). 



brane of the mouth, and occur in mucous membranes else- 

 where. 



The cornea contains delicate terminal plexuses sending 

 fibrils into the overlying conjunctival epithelium. 



In voluntary muscles fine terminal nerve-fibrils of sensory 

 nature have been demonstrated. 



Motor end-plates of voluntary muscle (Fig. 86) : The motor 

 innervation of striated muscle is derived through " end-plates," 

 which are terminals of medullated nerve-fibres. 



The end-plate, of which each muscle-cell possesses one, ex- 

 ceptionally more, is closely attached to the surface of the 



