202 



ELEMENTS OF HISTOLOGY. [Chap. xxv. 



Fig. 116. From a Longitudinal Section through 

 a Villus of the Small Intestine. 



a. The epithelium of the surface; 6, non-striped 

 muscular fibres. Immediately underneath the 

 epithelium is a basement membrane with oblong 

 nuclei; the tissue of the villus is made up of a 



reticulum of cells; in its meshes are 



corpuscles. 



mph 



vertically and 

 finely striated 

 basilar border. 

 Many cells are 

 goblet cells. 

 Underneath the 

 epithelium is a 



basement 

 , , 



brane > tne 



eDlthelial 

 C P 1U 



thelium OI JJe- 

 ] 



bove (see par. 39). 



, 



As in the stomach, so also 

 in the small and large intes- 

 tine, the mucosa is connected 

 with the outer muscular coat 

 by a loose-textured fibrous sub- 

 mucosa, in which lie the large 

 vascular trunks, and in many 

 places larger or smaller groups 

 of fat cells and lymph cor- 

 puscles. Between the mucosa 

 and submucosa, but belonging 

 to the former, is a layer of 

 non-striped muscular tissue, 

 the muscularis mucosce. This 

 is in many places composed of 

 inner circular and outer longi- 

 tudinal bundles, but there are 

 a good many places, especially 

 in the small intestine, where 

 only a layer of longitudinal rJTli7. From 

 bundles can be made out. 



The tissue of the mucosa is 



-i-n of vnr>f iivc* +r\ arlonrnrl 



in structure to aaenoia 



/TTirr 1 1 (\\ nrmcicfino- r*f 

 (fig. HO/, Consisting OI 



a iwHrvnlav rntifviY with flat 



a leticuiar matux wren nat- 



a vertical 



intestine of Dog. 



m > The mucosa containing the 



crJT ts of Lieberkuhn, cioseiy 



placed side by side ; each crypt 

 f s ii 



ne d with a layer of columnar 

 epithelium; mm, muscularis 



mu cosse ;, submucosa. (Atias.) 



