I40 



ELEMENTS OF MAMMALIAN ANATOMY 



like ihc (log, opossum, etc., esophageal glands are present 

 in the submucous coat. The function of these glands when 

 present is not exactly known (Goetsch Am. Jour. Anat., 

 1910). The mucous coat of the stomach contains the gastric 



Fig. 71a. — Diagram of a Small Cube Cut 

 FROM THE Wall of the Jejunum. 



a. Artery; v, vein; ly, lymphatic; /, lacteal; 

 vi, villi; m, mouth of intestinal gland; i, in- 

 testinal gland of Lieberkiihn; 7nm, muscularis 

 mucos£e; sub, submucosa; cm, circular muscu- 

 lar coat; Im, longitudinal muscular coat. 



Fig. 70. — Cross- sec- 

 tion of the Small In- 

 testine. X 5- 



ex, Longitudinal mus- 

 cular coat; tn, circular 

 muscular coat; mu, mu- 

 cous coat; lb, glands of 

 Lieberkiihn; se, serous or 

 peritoneal coat; sm, sub- 

 mucous or areolar coat. 



glands, which yield pepsin and hydrochloric acid, the chief 

 agents of the gastric digestive fluid (Fig. 69). The glands in 

 the cardiac end of the stomach differ from those in the pyloric 

 end in containing numerous parietal or acid cells which probably 

 secrete the hydrochloric acid for digestion. 



