OF THE CELLULAR SYSTEM. 65 



/2. By exhalation, through invisible vessels into the cel- 

 lular texture. 



Q. What is the adipose texture, as distinct from the 

 cellular? 



ft. It is the texture in which fat is formed and contained. 



Q. What is the structure of this adipose texture? 



ft. It is a soft, white structure, manifesting free exten- 

 sibility and contractility of texture. It assumes the form 

 of fine, semi-transparent laminae. It is filled with little 

 vesicles containing fat. 



Q. What evidence is there that a peculiar organization 

 is necessary for the formation of fat? 



ft. Because in many parts of the cellular texture there 

 is no fat. 



Q. What physiological fact is established by the absence 

 of fat in many parts which have been mentioned above? 



ft. Its presence would destroy or impede their functions. 



Q. Are the adipose vesicles impermeable? 



A. They are; for though the fat be rendered fluid, if 

 the adipose vesicle be unbroken, it does not escape. In 

 this it differs from the permeability of the cellular texture. 



Q. Is there any other material feature in which the adi- 

 pose and cellular textures differ? 



ft. Yes; the uses of the adipose are partial, those of the 

 cellular are general. 



Q. What is the chemical nature of fat? 



ft. It is composed of stearine and elaine, of sebacic, 

 margaric, and oleic acid. 



Q. What are soaps? 



ft. Salts formed by the uniojn of these acids with the 

 base that is used. 



9, 





