ANIMAL NUTRITION. 41.3 



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CHAPTER III. 



ANIMAL CHEMISTRY. 



ANIMAL NUTRITION. 

 1031. RELATIONS OF ANIMAL AND VEGE- 



How is the 



life of am- TABLE LIFE. The life of animals is sus- 

 mah sustain. tained by the consumption of material 

 compounded and prepared by the plant, 

 and converted into its own substance, out of the mate- 

 rials of the earth and air. This is virtually true even 

 of the carniverous species, for the animals on which 

 they feed have derived their support from the vege- 

 table world. When they yield their own flesh as food, 

 it is only a changed vegetable matter which they thus 

 supply. All animal matter may therefore be regarded 

 as vegetable matter, more or less modified, or entirely 

 transformed by the processes of the animal body. 



1032. FORMATION OF BLOOD. The blood 



tion of the material required for animal growth is 



blood? - , . * . mi V 



floated to its destination. This complex 

 fluid will therefore first engage our attention. The 

 food having been ground up by the teeth, and moist- 

 ened by the saliva, is conveyed to the stomach, and 



