THE DIGESTION OF THE NUTRIENTS 37 



gallons. This provision enables the horse to handle con- 

 siderable amounts of roughages. The large intestine is 

 larger in diameter and is considerably shorter than the small 

 intestine. It also contains many folds and convolutions, 

 especially at its upper end. It ends in the anus. In the 

 horse the upper end, just adjacent to the small intestine, is 

 much enlarged to enable the animal to handle roughage. 

 0^ving to this provision, the 

 large intestine of the horse 

 has the greatest capacity of 

 that of any of the farm ani- 

 mals, — about 30 to 35 gal- 

 lons. The large intestine of 

 the cow has a capacity of 

 about 8 to 10 gallons, and that 

 of the sheep about IJ gallons. 

 The large intestine of the hog ^^- - f— "> ^f ^^/^^h— 



is relatively large, as this is Physiology-.) l, The first colon of 

 , - . . . ^ , „ the large intestine ; 2, the ileum of 



the only provision it has for the small intestine. 



handhng roughage. It has a 



capacity of about 2f gallons, or nearly twice that of the 

 sheep. The length of the large intestine of the different 

 farm animals is approximately as follows : horse, 25 feet ; 

 cow, 36 feet ; sheep, 21 feet ; and hog, 15 feet. 



The accessory organs of digestion are the teeth, tongue, 

 salivary glands, liver, and pancreas. (See Figure 3.) The 

 teeth are used in the mastication or chewing of the feed, 

 while the tongue assists in conveying it into the mouth and 

 in swallo^ving it after mastication. The sahvary glands 

 are small glands located under the ears, under the lower jaw, 

 and between the branches of the lower jaw. They produce 



