50 



PRINCIPLES OF FEEDING FARM ANIMALS 



clrates, and fats. Thus each organism can use these building 

 stones in the proportion and order it needs to construct its 

 own proteins and organized matter, which in each organism 



Fig. 11. — Loop of small intestine of the horse during active absorption 

 showing distended lacteals. (Smith, Manual of Veterinary Physiology.) 



has an architecture as distinct and characteristic as the 

 form of the organism itself." 



SX3MMARY OF THE DIGESTION AND ABSORPTION OF THE 

 NUTRIENTS 



Inasmuch as the processes of digestion and absorption 

 are so complex, it may assist the student to summarize the 

 digestion and absorption of each individual class of nutrients. 



Water. — Water, of course, needs no digestion. It is ab- 

 sorbed to a slight extent by the capillaries of the stomach 

 and to a large extent by the capillaries of the villi of the 

 small intestine, and by the capillaries of the walls of the 

 large intestine. 



