THE HEALING OF WOUNDS 13 



Jw what animal has hemophilia been seen ? 

 It has only been observed in the horse. 



THE HEALING OF WOUNDS. 



2Vawe the various modes of repair by which destroyed tissues 

 are replaced. 



(1) Healing by first intention (per primam intentionem); 

 '(2) by second intention {per secundam intentionem); (3) by 

 "third intention {per tertiam intentionem); (4) healing under a 

 «curf ; (5) abnormal granulation and cicatrization. 



Define healing per primam intentionem. 



A primary union by cementing of the wound edges 

 ^without pus formation. 



■Under what conditions is primary union most likely to occu/r ? 

 When the hemorrhage is arrested, bloodclots and foreign 

 iDodies removed (dirt, hair, splinters, tissue shreds), when the 

 •wound is aseptic or rendered so, when the edges are smooth 

 ^nd straight and closely approximated, and when the wound 

 "is protected by an antiseptic dressing against secondary 

 infection. 



What Jcind of wounds may be readily healed by first intention ■ 

 in animals ? 

 Surgical wounds, provided an antiseptic protective dress- 

 ing can be applied. 



Describe the macroscopic changes seen in healing by first 



intention. 



First, the edges of the wound are united by blood, to be 



replaced by the so-called wound cement (a lymphoid plas- 



«natic liquid). About the second day the edges are red. 



