124 BIOLOGY. [Book ii. 



This double movement of acquisition and expenditure is 

 simultaneous in the blood, as the twofold movement of assimila- 

 tion and dis-assimilation is simultaneous in the anatomical 

 elements. 



After this general sketch of the nutritive going and conjing 

 within the complex animal, we can now occupy ourselves with 

 each of the three groups of immediate principles which enter 

 into the composition of the body of every animal, and indicate 

 in bold outline under what form they enter the organism, and 

 under what form they leave it. 



[Note. — A word which frequently occurs in the French 

 original is intime. To the Latin intim/us, the French intime, the 

 German innig, in their scientific import, there is not any exact 

 English equivalent, though ultimate and other words are employed 

 in lack of better. — Translatoe.J 



