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12. The organs enumerated in this section appear to form 

 one system: the division here adopted may be artificial, but 

 it is convenient. It is founded upon an apparent concurrence of 

 their several functions to produce lacteal chyle, and to convey it 

 into the system of the blood-vessels. The accomplishment of this 

 purpose constitutes that which is termed nutrition. The further 

 history of this lacteal fluid will shew that there is no part of the 

 body, no process in it, we may say no property of it, which does 

 not acknowledge a dependence upon this nutrient material. Hence 

 the organs which produce it are thus mediately related with all 

 other parts: the relations subsisting among themselves, and tribu- 

 tary to this one purpose, still afford an ample field for research and 

 discovery. Lacteal chyle being poured into the sanguiferous sys- 

 tem, its future history will commence from this point, and will be 

 involved in the phenomena dependent upon the blood. 



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