INTESTINAL DIGESTION 



217 



which enters the lymph, and later the blood, is neutral 

 fat in place of the compounds formed by its cleavage. 



The history of the foods after absorption can best be 

 followed when we shall have given some attention to the 



FIG. 51. This is a conventionalized drawing to show the essentials 

 in the structure of a villus. The lining cells of the intestine are shown as 

 in section. Within is seen a tangle of capillaries, and at the very core of 

 the villus a lymphatic (L) . The loose tissue, which in reality exists inside 

 the villus, has been ignored for the sake of simplicity. 



blood in which they are represented and the main facts 

 of the circulation. It may be well to anticipate one 

 point. Material arriving within the villi must at first 

 be in the indefinite lymph spaces of the tissue. From 

 these crevices it may enter the capillaries as most of it 

 does or it may leave the vicinity by pursuing channels 

 of another order, the lymphatics. This latter course 

 is taken by most of the fat. 



