106 DEFINITIONS, SUBDIVISIONS, ETC. 



underlie the whole domain of anatomy (as usually taught), and of 

 physiology and pathology. Comparative Histology will also be in- 

 troduced, especially so far as it gives interest, by its analogies or its 

 contrasts, to the study of the tissues in the human organism. 



The structural elements of the human organism may be arranged 

 in two classes : 



I. The simple histological elements. 

 II. The tissues, properly so called. 



The second part of this work will consist of three divisions, con- 

 taining 



I. A description of the simple histological elements, their distri- 

 bution, development, &c. 

 II. Of the fluids in the human body which contain histological 



elements. 

 III. Of the tissues, properly so called. 



