THE ANIMAL BODY— DIGESTION— METABOLISM 33 



3. Define digestion, digestible nutrient, ration, and balanced ration. 



4. Describe tlie alimentary canal of the ox. 



5. How does a cow chew her cud? 



6. Define enzymes and describe the action of saliva on starch. 



7. Describe digestion in (a) the mouth, (b) the simple stomach, (c) the 

 stomach of ruminants, (d) the small intestine, (e) the large intestine. 



8. What special provision has the liorse for digesting roughages? 

 !). Define metabolism. 



10. Describe the circulatory canals of the body. 



11. Describe the digestion and absorption of (a) fat, (b) of carbohydrates, (c) 

 of protein. 



12! How is the body waste disposed of? 



