DIGESTIVE ORGANS LARGE INTESTINE. 



Fig. 240. Fig. 241. 



533 



Portion of one of the Patches of Peyer's Glands Section of Small Intestine, containing some of 



from the end of the Ileum : highly magnified. 

 The Villi are also shown. (Boehm.) 



the Glands of Peyer, as shown under the 

 microscope. 



These glands appear to be small lenticular ex- 

 cavations, containing, according to Boehrn, a 

 white, milky, and rather thick fluid, with nume- 

 rous round corpuscles of various sizes, but mostly 

 smaller than blood globules. The meshes seen in 

 the cut are the ordinary tripe-like folds of the 

 mucous coat. 



Fig. 242. 



burst on the free surface of the mucous 

 membrane, and discharge their contents 

 to be mixed with the faeces. The marginal 

 figure, after Bendz, 1 illustrates the mor- 

 phology of a Peyer's gland. 



The muscular coat of the small intestine 

 is composed of circular and longitudinal 

 fibres ; and the outer coat is formed by 

 the prolongation of the peritoneum, which, 

 after having surrounded the intestines, 

 completes the mesentery, by which the 

 gut floats, as it were, in the abdominal 

 cavity. 



The large intestine terminates the intes- 

 tinal canal. It is much shorter than the side View of Intestinal Mucous Mem- 

 small, and Considerably more Capacious, braneofaCat. (After Bendz.) 



being manifestly intended, in part, as a A Peyer'sgiand, imbedded in sub- 



* . . J '. ." ' . mucous tissue,/, b. A tubular follicle. 



reservoir. It IS leSS lOOSe in the abdomi- c. Fossa in mucous membrane, d. Villi. 



nal cavity than the portion of the tube ' F 



which we have described. It commences 



at the right iliac fossa (Fig. 210, 9); ascends along the right flank, as 



far as the under surface of the liver ; crosses over the abdomen to gain 



the left flank, along which it descends into the left iliac region, and 



1 Haandbog i den Almindenige Anatomic. Kjobenhavn, 1847, cited by Kirkes and Paget, 

 Manual of Physiology, Amer. edit., p. 186, Philad., 1849. 



