DERMOTD SYSTEM, 291 



Q. Is there not another set of capillaries in the reticu- 

 lar body besides that which contains the colouring princi- 

 ple? 



<fl. Yes; there are thos^ which furnish the exhalents of 

 the perspiration. 



Q. Why is this last portion of the reticular body so im- 

 portant to pathologists? 



tf. Because it is the seat of the eruptive diseases, erysi- 

 pelas, &c. 



Q. What is the reason that in serous effusions on the 

 serous membranes, bladders of that fluid do not form, as 

 on the skin? 



JL. Because on these membranes there is no epidermis 

 to form the blister. 



Q. What'part of this reticular capillary system is most 

 apt to be filled with blood? 



#. The facial portion. 



Q. What' is the reason of this? 



#. Because in the face the communication between the 

 reticular texture and the arteries of the chorion is more 

 free, and because the sensibility of the texture in the face 

 is greater than it is elsewhere in that tissue. 



Q. In what three modes^does the face express the pas- 

 sions? 



#. In the eye, in the muscles of the face, and in the 

 facial reticular texture. This last is entirely involuntary. 



Q. Can you say how this reticular tissue expresses the 

 passions? jp 



#. By the quantity of blood, as in blushing under 

 mental emotion, and by the absence of blood, as in the 

 paleness of fear. 



Q. What pathological fact arises from this natural 



