186 Veterinary Elements. 



material needed in this case, therefore any inflammation 

 present must have been slight. 



2. Union by first-intention, in this form the divided 

 edges are glazed over by a fluid (lymph) thrown out 

 from them, or the clotting of a thin film of blood; this 

 material holds the parts together until permanent union 

 by cells takes place; the fluid has to be got rid of before 

 permanent healing takes place, a scar results from this 

 and the following method. The lymph thrown out 

 becomes vascular, i. e., little (capillary) blood vessels 

 form in it. 



3. Granulation is the commonest form of healing in 

 the lower animals, it is a tedious process accompanied as 

 a rule by the formation of pus; in this form lymph is 

 thrown out, it accumulates, blood vessels form in it, cells 

 cluster around the vessels constituting granulation tissue; 

 the upper layer of lymph cells is destroyed and thrown 

 off as pus, it has, however, served to protect the deeper- 

 layers which form a tissue resembling that of the part, 

 gradually the discharge of pus ceases, a new surface (the 

 scar), white in color, is formed, which gradually disap- 

 pears and the wound is said to be healed. If the inflam- 

 mation in a wound is unchecked, or there is lack of 

 pressure, the small vessels, capillary loops, become dis- 

 tended with blood and constitute what is known by every 

 one as proud flesh (granulation tissue). Two other 

 methods of healing are by unio7i of two granulating surfaces, 

 and under a scab. All wounds heal essentially in the 

 same manner, viz., by the growth and organization of 

 new tissue from the already existing older tissue of the 

 parts. 



