176 



THE ESSENTIALS OF HISTOLOGY. 



The submucous coat is like that of the stomach ; in it the blood- 

 vessels and lymphatics ramify before entering or after leaving the 

 mucous membrane, and it contains a gangliated plexus of nerve-fibres 



s 



FIG. 206. SECTION OF THE ILEUM THROUGH A LYMPHOID NODULE, (Cadiat.) 



a, middle of the nodule with the lymphoid tissue partly fallen away from the section ; b r 

 epithelium of the intestine ; c, villi : their epithelium is partly broken away ; </, crypts 

 of Lieberkiihn. 



FIG. 207. CROSS-SECTION OF AN INTESTINAL VILLUS. 



e, columnar epithelium ; g, goblet-cell, its mucus is seen partly extruded ; I, lymph-corpuscles 

 between the epithelium -cells ; b, basement-membrane ; c, blood-capillaries ; m, section ot 

 plain muscular fibres ; c.l, central lacteal. 



the plexus of Meissner which is finer than that of Auerbach and has 

 fewer ganglion-cells (fig. 204). Its branches are chiefly supplied to the 

 muscular fibres of the mucous membrane. 



