400 



MANUAL OF HISTOLOGY. 



sue. Its component nerves are less flattened, but are likewise 

 provided with ganglia containing variously shaped ganglion- 

 cells. This plexus also gives origin to the secondary networks 

 of the muscularis mucosse, and is besides connected by certain 

 branches with Auerbach's plexus. 



THE LARGE INTESTINE. 



The histological structure of the colon, broadly speaking, 

 very nearly resembles that of the preceding section of the ali- 

 mentary canal. The lining epithelium of the mucous mem- 

 brane presents the same characteristic appearances as in the 



Pio. 172. Section of the large intestine of rabbit: J, crypts of Lleberk'uhn : a, epithelium ; 6, mn- 

 ooe ; m, muscularis mucosae ; , Eiibmuco.su : li, circular muscular layer ; Z, longitudinal muscular layer ; 

 p, peritoneum. Verson. 



small intestine. The mucosa of the colon is, however, devoid 

 of villi ; but it shows numerous crescentic folds. The muscu- 

 laris mucosae will be found to answer to the description already 

 given of that layer in the small intestine. 



The submucosa also shows the same morphological compo- 

 sition, but appears to be much richer in deposits of fat-cells. 

 Aggregations of lymph-follicles are not generally found, but 

 large, conspicuous solitary glands abound throughout. 



The crypts of Lieberkuhn are identical with the glands of 





