Digestion in the Intestine. 181 



produces irritation. So, in the mouth, gullet, stomach, 

 or intestine, the irritating effect of alcohol causes an 

 increased secretion by the glands. That is, more saliva 

 is poured out, more gastric juice, etc., and more mucus is 

 secreted and poured out all along the digestive tube. All 

 this is an effort of self-protection; and the diluting of the 

 alcohol thus brought about diminishes, though it cannot 

 stop, the poisonous effects of the alcohol. 



Effect of Cider on the Small Intestine. The continued 

 use of hard cider is likely to have a very injurious effect 

 on the small intestine. Cases have been known in which 

 it has caused death, with extensive ulceration of the walls 

 of the small intestine. 



Summary. i . The intestine has two coats, an outer, muscular, and 

 an inner, mucous, coat. 



2. The intestine consists of two parts, the small intestine and the 

 large. 



3. The liver is the largest gland in the body. It secretes bile, which 

 is stored in the bile sac. 



4. Bile aids in emulsifying and absorbing fats, and retards putre- 

 faction. Bile is partly waste matter. 



5. The pancreas is a small tongue-shaped organ back of the 

 stomach. It secretes the pancreatic juice. 



6. Pancreatic juice acts on proteids, fats, and starch. 



7. In the walls of the intestine are many small intestinal glands. 

 Their secretion helps complete the process of digestion. 



8. The main part of the large intestine is the colon. It has three 

 parts, ascending, transverse, and descending. The last part of the 

 intestine is the rectum. 



9. The small intestine is twenty-five feet long, the large, five or six. 



10. A gland is a hollow structure that secretes a liquid from the 

 blood. 



1 1 . Glands are simple, like an intestinal gland, or complex, like the 

 pancreas. 



12. Glands are excretory,, such as the sweat glands, or secretory, 

 such as the gastric glands. 



