3. Some starch changed to sugar. 



4. Slight absorption of water, sugar 



NUTRITION 379 



etc. 



Stomach. 



Location. 

 Shape and size. 

 Functions. 



1. Storage (why, what homologous organs). 



2. Further separation of food particles. 



3. Digestion of proteids by means of pepsin. 



4. Coagulation of milk casein. 

 Gastric fluid. 



1. From gastric (simple) glands, acid glands. 



2. Amount, secretion aided by saliva if well mixed. 



3. Composition ' Function 



Hydrochloric acid Neutralize saliva, aid pepsin. 



Pepsin Proteid to peptone. 



Dissolves connective tissue. 



Exposes more surface for digestion. 



Rennin Coagulates milk proteid (casein). 



Composition of chyme. 



1. All fats unchanged. 



2. Most carbohydrates (what exception?). 



3. Much unchanged proteid. 



4. Un-absorbed peptones, sugars, water, etc. 



Intestine. 



Pylorus, location and function. 



Parts, small, large, colon, rectum, etc. (need not learn). 



Appendix (lower right side). 



Adaptations for increase of surface' (for osmosis for absorption). 

 Length, 25 ft., much coiled. 

 Walls in-folded. 



Villi (each with blood vessels and lacteals). 

 Surface increased five times, twice area of skin. 

 Muscular intestinal walls. 

 Muscles involuntary. 

 Keep food moving along. 

 Mix food with fluids and crush it. 

 Very important in digestion. 

 Glands. 

 Intestinal. 



Small, simple, numerous, in the intestine wall lining. 

 Secretion, alkaline; soda carbonate; sugar ferment. 

 Function, saponify fats, act on sugar somewhat. 

 Liver. 



Largest gland, uppermost in viscera, over stomach. 

 Bile, thick, brown, one quart daily. 



