82 



HISTOLOGY. 



of the fact that the section passes through different parts of the 

 spindle-shaped cells (Fig. 47). The smaller areas contain no 

 nucleus, because they are sections of the small ends of the cells. 



FIG. 47. 



Cross-section of smooth muscle from a dog's large intestine, a, cell cut at level of nucleus ; 

 6, cell cut near the end ; c, nucleus of connective-tissue cell. X 800. 



The cells are joined together by a small quantity of cement 

 substance. Intercellular bridges are also often to be made out 

 passing across the cement substance (Figs. 46 and 48) (Kults- 



FIG. 48. 



E^ 









Cross-section of smooth muscle of a dog's large intestine, showing intercellular bridges. 

 a, cell cut at level of nucleus; b, cell cut near the end ; d, intercellular bridges. X 800. 



chitzsky, Barfurth). The presence of protoplasmic bridges in 

 smooth muscle is doubted by other authors (Schaffer, J.). The 

 cells may be separated by maceration in dilute solutions of potas- 

 sium or sodium hydroxide. Between the groups of cells are 

 found blood-vessels and nerves imbedded in connective tissue. 



