122 



ELEMENTS OF HISTOLOGY. [Chap. xv. 



plexus pass off isolated or small groups of primitive 

 fibrillse, which pursue their course in the interstitial 



Fig. 76. Bundles of Non-striped Muscular Tissue surrounded by 

 Plexuses of Fine Nerve-fibres. (Handbook.) 



substance be- 

 t wee n the 

 muscle cells; 

 these are the 

 inter muscular 

 fibrils (Fig. 76A). 

 According to 

 Frankenhaiiser 

 and Arnold, 

 they give off 

 finer fibrils, 

 ending in the 

 nucleus (or 

 nucleolus). Ac- 

 cording to 

 Elischer, the 

 primitive fibrils 

 terminate on the 

 surface of the 

 nucleus with a 

 minute swelling. 



Fig. 76A. Termination of Nerves in Non- 

 striped Muscular Tissue. 



a, Non-medullated fibre of the intermediary plexus ; 

 b, fine intermuscular fibrils ; c, nuclei of muscular 

 cells. (Atlas.) 



