156 THE HORSE IN HEALTH AND DISEASE 



anisms, and harmful agencies neutralized, poisonous substances 

 eliminated, and the tissues repaired. 



(2) Incomplete recovery, where, after a disease has run its 

 course, there is some permanent impairment of tissue (sequelae of 

 disease) ; for example, adhesion of the lungs after pleurisy, opacity 

 of the previously transparent parts of the eye, deformities of bones. 

 Many times the organ will be, for all practical intents and purposes, 

 as serviceable as before. 



(3) Death, which occurs when the vital organs suspend their 

 functions. It is brought about by the failure of either the res- 

 piratory, the circulatory, or the nervous functions, or it may be 

 due to a complication of these causes. Death may occur suddenly, 

 in which case the animal collapses, becomes unconscious, and for a 

 few moments at most is thrown into convulsions, as in lightning- 

 stroke or sunstroke. In the majority of cases death comes on 

 gradually, and terminates in the so-called death agony or death 

 struggle. This mode shows progressive paralysis of the different 

 systems of body organs. Animals in the agonal state are unable to 

 rise, lie fiat on one side, and lift the head from time to time and let 

 it fall heavily. They may sweat profusely and involuntarily void 

 urine and feces. 



