65 



CHAPTER IV. 



STRUCTURE OF ANIMALS AS ADAPTED TO THEIR 

 MODES OF LIFE* 



Organs of Mastication, Digestion, Circulation 

 of the Blood, and Respiration. 



I HAVE already shortly alluded to some of the dif- 

 ferences in the functions which animals perform ; 

 and, I now proceed, in this and the following 

 chapter, to endeavour to show how admirably 

 the several organs, engaged in the performance 

 of these functions, are respectively adapted to 

 the end in view. In a sketch of this nature, it is 

 manifestly impossible to do more than call atten- 

 tion to a few of the most prominent features of 

 the subject ; but, from even one or two instances 

 of obvious design, we may draw inferences as 

 certain of the wisdom and the goodness of the 

 great Creator, as from thousands ; and hundreds 

 of thousands would be inadequate to impress us, 

 with more than a faint idea, of the stupendous 

 extent to which this wisdom and this goodness 

 are displayed in the animal creation. 



In pointing out a few of the different relations 

 of the structure and functions of animals to their 



