6 SWELLING IN INFLAMMATION. 



the vessels of the inflamed part, from their enlarged 

 capacity, which is very evident when the eye is 

 inflamed. The vessels that before only admitted 

 the almost colourless part of the blood to enter, 

 are now seen to allow the red particles of the blood 

 to flow through them. (See Inflammation of the 

 Eyes.) The swelling of inflammation is also owing 

 to an effusion of coagulable lymph from the in- 

 flamed vessels into the contiguous cellular texture ; 

 and after the inflammation has existed some time, 

 new vessels are formed in the part. The other 

 marks of inflammation are increased sensibility 

 and heat. The pain arises in consequence of the 

 injury the nerves have suffered, by which they are 

 labouring under excitement, or increased and mor- 

 bid action. It also arises from the small filaments 

 of the nerves being distended, from the dilated 

 state of the arteries and other parts. The increased 

 heat depends upon the greater quantity of blood 

 contained in the blood-vessels of the inflamed part, 

 and the increased excitement of the nerves acting 

 upon the constituent parts of that blood, by which 

 more heat is evolved, than usual, and consequently 

 the blood here more mreficd. 



High feeding, and want of exercise, as when a 

 horse is removed at once from grass or the straw- 

 yard to a hot stable, will make him liable to local 



