246 MUCOUS SYSTEM. 



faces, and on the glans penis, it is much more acute than 

 on the skin. 



Q. Why is animal sensibility so manifest on this tis- 

 sue? 



*ft. In order to watch the impression of foreign bodies, 

 to the contact with which it is constantly liable. 



Q. What effect has habit on the animal sensibilities of 

 the mucous tissues? 



t/?. It renders sensations which are at first painful, 

 either indifferent or pleasant, and vice versa. As you ad- 

 vance in life, repeated and habitual contact diminishes the 

 sensibility of the tissue. 



Q. Why is it that the gall-bladder does not perceive 

 bile? 



*#. Because habit and uniformity of perception allow 

 no comparative sensations. 



Q. What effect has disease on the animal sensibility of 

 this texture ? 



A. It raises it considerably, but never to such exalta- 

 tion as is felt in the serous and cellular tissues. 



Q. Is there much animal contractility in the mucous 

 tissue? 



#. There is none. 



Q. What organs feel most acutely in disease? 



t/?. Those which feel least in a natural state. 



Q. What properties of organic life are conspicuous in 

 the mucous tissue? 



Ji. Both organic sensibility and insensible organic con- 

 tractility; and these are kept in activity by the nutrition, 

 exhalation, absorption, and secretion, which go on in 

 these tissues. 



