INFLAMMATION. 



117 



The Healing of Wounds. 



The way in which new inflammatory tissues are formed may be best 

 understood by following the process of healing in a wound with loss of 

 substance for example, in a wound through the skin or a mucous mem- 



FIG. 4.5. FRAGMENTS OK NECROTIC MUSCLE IN PROCESS OF ABSORPTION UNDER THE ACTION OF 



PHAGOCYTES. 



brane into the tissue beneath. At first there may be haemorrhage. After 

 this has ceased, the injury to the tissue, the unusual exposure of deep- 

 seated parts, the presence of foreign substances, etc., may induce the 

 same series of events which we have seen occurring in exudative inflani- 





FIG. 46. GRANULATION TISSUE FROM WOUND OF TONGUE. 



Early stage with very thin-walled blood-vessels, leucocytes, and young connective-tissue cells. There are 

 few intercellular fibrils. 



ination .with production of serum, fibrin, and pus. The blood-vessels 

 dilate, the circulation becomes slower, serum transudes, and emigration 

 sets in. Certain of the cells and fragments of intercellular substance 

 near the seat of injury may die, and in time are cast off or are disinte- 



