ttnall 

 intestines 



EXERCISE 85 (Continued) 



Questions. In what respects does the alimentary canal of an ox differ from that of a pig? In 



what respects does the digestive tract of a chicken differ from that of the ox? of the pig? Which 



of these animals is most capable of 



handling coarse food, and why? Why 



does the chicken need gravel or crushed 



stone? Explain the effect of grinding 



grain upon the ease and rapidity with 



which it is digested. Is a foodstuff 



containing much crude fiber more or 



less readily and completely digested 



than one containing little fiber, and 



why ? How many stomachs has the ox ? 



What is meant by the term "ruminant" 



and to what class of animals is it 



applied? Consult the tables in the 



Appendix and state what proportion of 



corn and other common feeds is digested. 



Fig. 140. The digestive tract of a cow 



„ , „ T tt t t-> a- 1 Diagram from Iowa State College 



References. Waters, H. J. Essentials 



of Agriculture, pp. 320-329. Ginn and Company. Henry and Morrison. Feeds and Feeding Abridged, 

 pp. 18-33. The Henry Morrison Company. Jordan, W. H. The Feeding of Animals, pp. 98-126. The 

 Macmillan Company. Harper, M. W. Animal Husbandry for Schools, pp. 58-63. The Macmillan Com- 

 pany. 



roof of mouth 

 tongue 



salivary 

 omasum, or ducts 

 manyplies 



reticulum, or honeycomb 



abomasum, or 



rennet I true stomach) 



[169] 



