K\'FI.A.\1 MATION. 139 



THE KIXDS OF IXFL.-IMM. ITION. 

 J-liolotjy. 



Simple. 

 Infective. 



\oii-siippurath'e. 

 SKp/yiiratizr. 

 Surface. 

 Si(b-surface. 

 l'..\-udatc. 

 Serous. 

 Fibrinous, 

 lleinorrhayic. 

 Tissue. 



Pareiichytiiatous. 

 Interstitial. 

 Time, activity and results. 

 Acute. 

 Chronic. 

 Miscellaneous. 

 Catarrhal. 

 Purulent. 

 Vlcerative. 

 1 'esicular. 

 Pustular. 

 Proliferative. 

 Sfecific. 

 TERMINATION. 



Resolution. 

 Tissue proliferation. 

 Llissolution. 

 CONCLUSIONS. 



Inflammation is a name applied to a .srroup of pathologic 

 processes including circulatory disturbances, retrogressive and 

 progressive tissue changes. The term inflammation is difficult 

 to define because of the several factors entering into the process 

 and of the variation of each factor. It may be defined as the 

 reaction of a living animal tissue to an irritant. 



A stimulus is anything that produces action in a living tis- 

 sue. An irritant is anything that produces excessive stimulation 

 in a responsi\'e tissue. Stimuli and irritants differ only in 

 degree. Mild friction of the skin is a stinndns to that structure. 

 \Mien the friction is intensified and the cutaneous function is 

 overstimulated the friction becomes an irritant. All living tis- 

 sues respond to stimuli and likewise t(T irritants. The response 

 or reaction of a living tissue to an irritant, i. e. excessive tissue 

 stimulation, accompanied by circulatory disturbances and by 

 destructive or jiroliferative tissue changes, constitutes the pro- 

 cess known as inflanmiation. The general phenomena of in- 

 flammation will be better understood if some preliminary con- 

 siderations of the reaction to stimuli are first discussed. 



General Consideration of Stimuli and Reactions. — It is a 



