ORGANS OF DIGESTION. 



rounds the muscular coat of the stomach and intestines. 

 It is merely a reflected portion of the peritoneum which 



lines the entire abdominal cavity. 



THE ACCESSORY GLANDS OF DI- 

 GESTION. 



The salivary glands are five in 

 number on each side of the head. 

 They secrete the saliva, certain 



FIG. 63. A, CROSS-SECTION OF THE Mucous COAT OF THE INTESTINE 

 BETWEEN a AND c, IN FIG. 62. ' 200. Diagrammatic. 



i'il, Two villi projecting into the lumen of the intestine; <?/>, columnar 

 epithelial cells; /, lacteal; a artery; r, vein; Ib, gland of Lieberkiihn; 

 m, mouth of gland of Lieberkiihn; ar, location of areolar or sub- 

 mucous coat. 



B, PHOTOMICROGRAPH OF SECTION OF INTESTINE WITH BLOOD-VESSELS 



INJECTED. 



b, Large artery; mu, muscular coat; s, submucous or areolar coat. 



elements of which have the power of changing starch 

 into sugar. 



