NUTRITION PROPER. 3Ig 



SECTION IV. 

 Intestinal Digestion : Chylification ; Emulsiftcation. 



Intestines ; Form, Structure, and Relations to 

 the Abdominal Cavity.— The intestines consist of a 

 long, slender tube— in man about thirty-five feet long 

 and one inch to two inches in diameter. It is divided 

 into two very distinct parts— viz., the small and large 

 intestines. These differ in size, the small being about 

 one inch, the large two inches in diameter. They differ 

 also in appearance, the first being smooth, cylindrical, 

 the second puckered and sacculated by a strong mus- 



Fig. 204. — The junction of the small and large intestines : si, small intes- 

 tines ; li, large intestines ; cae, cascum ; vap, vermiform appendage. 



cular band (Fig. 204). The true process of digestion is 

 substantially completed in the former. The function of 

 the latter is not well understood, but both the charac- 

 teristic color and odor of excrements are taken on here. 

 Also the peculiar shape of the balls in the horse or pel- 

 lets of sheep and goats are given here. 



The two parts do not grade continuously the one 

 into the other. On the contrary, the small open into the 



