CHAPTER XI. 



FUNCTIONS OF THE INTESTINAL MUCOUS MEMBRANE. 



In the mucous membrane of the intestine are found small 

 glands of two distinct kinds. The glands of one kind, which are 



FIG. 76. 



Portion of the Wall of the Small Intestine laid open to show the valvulae conniventes. 



(Brinton.) 



commonly called Briinner's glands, and are localized in the duo- 

 denum, are insignificant in number when compared with the 



FIG. 77. 



Drawing of transverse section of the Duodenum showing Brttnner's Glands (B) opening 

 into Lieberktihn's follicles (L); (v) villi, (M) muscular coats. 



others, Lieberkuhn's glands, which are closely set and distributed 

 over the entire intestinal tract in enormous numbers. 

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