NEEDS OF THE ANIMAL 



357 



motion of this part of the stomach churns and grinds 

 the food. The 

 bird swallows 

 small stones 

 which greatly 

 help in this pro- 

 cess. From the 

 gizzard the food 

 passes directly 

 into the intes- 

 tine (see figure 

 182). 



Animals such 

 as cattle and 

 sheep, which 

 live entirely on 

 grass, have to 

 eat very much 

 more food than 

 those which 

 live on flesh. 

 They eat large 

 amounts of 

 grass without 

 stopping to 

 cnew it tnor- FIG 182 _ Digestive apparatus of a fow i . ( D tongue, 



OUrfllv. Before (3) cr P> (6) gizzard, (10) small intestine, 



3 , . (15) pancreas, (16) liver, (17) gall bladder, 



Beaching the (is) spleen. 



