58 OP THE CELLULAR SYSTEM. 



Q. Is there no other influence spread by this cellular 

 atmosphere around the organs? 



t/#. Medicinal agency is conveyed by it. 



Q. Give instances of this. 



ft. The effect of blisters, cataplasms, and other appli- 

 cations may be adduced. 



Q. How are the vital forces of organs generally in- 

 jured? 



Ji. In three ways: 1st, by direct irritation; 2d, by 

 sympathy; 3d, by cellular communication. The last is 

 exemplified in the discolouration and inflammation of the 

 skin over a carious bone. 



Q. What other physiological office is performed by this 

 cellular investment? 



t/2 It facilitates the motion and expansion of organs. 



Q. What other means have some organs to facilitate 

 their mobility? 



Ji. The serous membranes perform this office in many 

 cases. 





 Of the. Internal Cellular Structure of the Organs. 



Q. What relation does this bear to the several organs? 



#. It enters intimately into their elementary structure; 

 it surrounds each vessel, nerve and fibre; it insulates each 

 by sheathing it; and it favours the mobility of the fibres 

 and vessels of the organs. 



Q. Does it partake of the vital properties of the organs? 



Ji. It does not; the cellular texture has its own vital 

 properties. It has not the sensibility of the nerve into the 

 structure of which it enters; it has not the contractility of 

 the muscle, nor yet the secretion of the gland. 



