152 



THE ESSENTIALS OF HISTOLOGY 



from the intestinal contents ; (3) migration of the lymph -corpuscles 

 carrying the incepted fat-particles by their amreboid movements through 

 the tissue of the villus and into the central lacteal ; (4) disintegration 

 and solution of the immigrated lymph-corpuscles, and setting free both 

 of their fatty contents and also of the proteid matters of which they 

 are themselves composed. 



str 



str 



FIG. 185, A. SECTION OF THE VILLUS OF A RAT KILLED DURING FAT-ABSORPTION. 



ep, epithelium ; str, striated border ; c, lymph-cells ; c', lymph-cells in the epithelium ; 

 I, central lacteal containing disintegrating lymph-corpuscles. 



FIG. 185, B. Mucous MEMBRANE OF FROG'S INTESTINE DURING FAT-ABSORPTION. 



ep, epithelium ; str, striated border ; c, lymph-corpuscles ; I, lacteal. 



This migration of the lymph -corpuscles into the lacteals of the 

 villi is not a special feature of fat-absorption alone, but occurs even 

 when absorption of other matters is proceeding ; so that the transfer- 

 ence of fat-particles is merely a part of a more general phenomenon 

 accompanying absorption. 



THE LARGE INTESTINE. 



The large intestine has the usual four coats, except near its ter- 

 mination, where the serous coat is absent. The muscular coat is pecu- 

 liar in the fact that along the caecum and colon the longitudinal 

 muscular fibres are gathered up into three thickened bands which pro- 

 duce puckerings in the wall of the gut. 



