288 



HANDBOOK OF PHYSIOLOGY. 



The general arrangement of ganglia and nerve-fibres in the large in- 

 testine resembles that in the small (p. 260). 



Glands. The glands with which the large intestine is provided are 

 of two kinds, (1) the tubular and (2) the lymphoid. 



(1.) The tubular glands, or glands of Lieberkiihn, resemble those of 

 the small intestine, but are somewhat larger and more numerous. They 

 are also more uniformly distributed. 



(2.) Follicles of adenoid or lymphoid tissue are most numerous in the 

 caecum and vermiform appendix. They resemble in shape and structure, 



FIG. 201. Diagram of lacteal vessels in small intestine. A, lacteals inyilli; p, Peyer's glands; 

 B and D, superficial and deep network of lacteals in submucous tissue; L, Lieberkuhn's glands: E, 

 small branch of lacteal vessel on its way to mesenteric gland; H and o, muscular fibres of intes- 

 tine ; s, peritoneum. (Teichmann.) 



almost exactly, the solitary glands of the small intestine. Peyer's patches 

 are not found in the large intestine. 



Ileo-caecal Valve. The ileo-caecal valve is situate at the place of 

 junction of the small with the large intestine, and guards against any re- 

 flux of the contents of the latter into the ileum. It is composed of two 

 semilunar folds of mucous membrane. Each fold is formed by a dou- 

 oling inwards of the mucous membrane, and is strengthened on the out- 

 side by some of the circular muscular fibres of the intestine, which are 

 contained between the outer surfaces of the two layers of which each fold 

 is composed. "While the circular muscular fibres, however, of the bowel 



