322 GENERAL ANATOMY. 



of action, or even without an appreciable cause. Hypertro- 

 phia sometimes takes place as the effect of the cessation of the 

 action of other organs and especially of a double gland. It is 

 frequently accompanied with some alteration of structure. 



492. The inflammation of the glands is common, and often 

 occurs by extending all the way in the excretory canal, from 

 its orifice to its radicles in the gland. Inflammation in them 

 is often suppurative and sometimes plastic; from which results 

 the obliteration of the ducts and the induration of the tissue. 



493. Accidental productions, either healthy or morbid, are 

 very common in the glands. The ovaries are most subject to 

 them, but especially to analogous productions; the testicles, 

 the liver and mammae, are very subject to morbid ones; the 

 lachrymal and salivary glands, and pancreas, are, on the con- 

 trary, very little liable, either to the one or to the other acci- 

 dental productions. 



494. Glandular tissue is not produced accidentally. When 

 it is wounded, the radicles or trunk of the excretory duct be- 

 ing divided, the secreted matter is poured into the wound, 

 which has a great tendency to become fistulous and to remain 

 so. 



495. Here ends the description of all the systems or kinds 

 of organs which belong especially to the vegetative functions; 

 those which remain to be described belong more particularly 

 to the animal functions. This distinction would be obvious did 

 not one of the tegumentary membranes, the mucous membrane, 

 belong principally to the functions of nutrition and generation ; 

 while the other, the skin, is chiefly subservient to the sensa- 

 tions: it is the tegumentary system which unites the two classes 

 of functions and organs. 



