CHYMIFICATION. 



Fig. 22. 



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2. The slomac/i, (Fiy. 22, es.) 

 is a membranous pouch, placed 

 transversely at the superior 

 part of the abdomen or belly. 

 it has the form of a bag-pipe, 

 and presents two openings; 

 one situate to the left, and 

 called cardia, (because it is 

 nearest to the heart,) commu- d> 

 nicates with the oesophagus ; 

 the other, called pylorus, (from 

 the Greek, pulouros, a gate- 

 keeper, because it shuts up the 

 food in the stomach, until con- 

 verted into chyme,) occupies 

 the right extremity of this 

 organ, and empties into the 

 intestines. 



3. Immediately after the pas- 

 sage of the alimentary ball, the 

 cardia closes in such a manner 

 as to hinder it from re-ascend- 

 ing again to the mouth. The 

 pylorus is also closed, and the 



consequence is, that the food is arrested in the stomach, 

 forced to remain there a considerable time. 



4. While the aliment thus sojourns in the stomach, it imbibes a 

 peculiar liquid, called gastric, jvicf, which converts it into chyme. 



5. The yaxtric juice is a watery and acid liquid which is 

 generated in a great number of very small cavities, lodged in the 

 thickness of the parietes, or coats of the stomach, and named 

 gastric fo/lic/es ; each one of these follicles communicates with 

 tne interior of this organ by a small pore, and thus empties the 

 gastric juice upon the food. 



ac 



,r 



and 



Explanation of Fig. 22. Principal organs of digestion, oe. oesophagus, or 

 gullet, es stomach, d. the duodenum, the first part of the small intestine, 

 ig. the small intestines, c. the coecurn, ac. coecal appendix, or appendix 

 vcrmiformis.--co. colon, r. rectum, y. the liver, of. the gall bladder. pa 

 the pancreas, s. spleen. 



2. What is the stomach ? What is the cardia ' What is the pylorus.' 



3. What takes place after the alimentary ball passes in the stomach ? 



4. What is added to the alimentary mass while in the stomach? 



5. Wl.ai is gastric juice? Where is it formed? 



6 



