DIGESTION. 



time to recognize that its real wants are met, and that its 

 losses have been made good; and hence the appetite con- 

 tinues, although more nutriment has been swallowed than 

 the system requires, or can healthfully appropriate. 



22. The Stomach. As soon as each separate portion 

 of food is masticated and insalivated, it is swallowed ; that 



is, it is propelled down- 

 ward to the stomach, 

 through a narrow mus- 

 cular tube about nine 

 inches in length, called 

 the ffisopliagux, or gul- 

 let (Fig. 'S3). The 

 stomach is the. only 

 large expansion of the 

 digestive canals and is 

 the most important or- 

 gan of digestion. It is 

 a hollow, pear-shaped 

 pouch, having a ca- 

 pacity of three pints, 

 in the adult. Its walls 

 are thin and yielding, 

 and may become un- 

 naturally distended, as 

 in the case of those 

 who subsist on a bul- 

 ky, innutritions diet, 

 and of those who habitually gormandize. 



23. The stomach has also two openings; that by which 

 food enters, being situated near the heart, is called the 

 cardiac, or heart orifice; the other is the pylorus, or 

 " gatekeeper," which guards the entrance to the intestines, 



. 22. SECTION op CHEST AND ABDOMEN. 



A, Heart. D, The Liver. 



B, The Lungs. E, Large Intestine. 



C, Stomach. G, Small Intestine. 



22. Gullet? Describe the stomach and its location. Effects of gormandizins? 



23. Heart-orifice? Gatekeeper? Coins, etc.? Indication of the soil and 

 yielding texture of the stomach ? 



