OF THE CELLULAR SYSTEM. 63 



punctures; the ascent and descent of fluids on pressure 

 these and other facts prove this communication between 

 the cells. 



Q. By what fluids is this texture exclusively permeable? 



A. By fat and serum. Fluids do not pass through this 

 texture from the stomach to the skin and bladder, as has 

 been supposed. The vital forces of the cellular texture are 

 only in relation to fat and serum. 



Q. What part of this texture is destitute of fat? 



/?. The eyelids, scrotum and prepuce, bones, hair, epi- 

 dermis, brain, spinal marrow and serous system. 



Q. Is there much serum in the healthy state of this tex- 

 ture? 



#. There is not as much as is supposed. Recollect how 

 it accumulates in disease. 



Q. What is the nature of this serum ? 



A. It is proved to be albuminous. 



Q. In which muscles, those of animal or those of or- 

 ganic life, is there most fat found? 



JL. There is little in the muscles of organic life; it 

 abounds in those of animal life. 



Q. Where is fat almost exclusively found in infants? 



t/?. In the sub-cutaneous cellular texture. 



Q. Where is it most abundant in adult life? 



*#. At that period the abdominal fat is in greatest abun- 

 dance. 



Q. In old age what becomes of the fat? 



A. It disappears; perhaps it is not deposited, or the ab- 

 sorption may be more active. 



Q. Is a considerable accumulation of fat to be viewed 

 as a normal or abnormal process? 



