CAPILLARY SYSTEMS. 151 



Q. Have the tissues different temperatures? 



Jl. They have. There is less in the hair, nails, epi- 

 dermis. There is less heat in the white organs than in 

 the red. 



Q. If this be the case, how is the general temperature 

 uniform? 



/#. The tissues which evolve much caloric supply those 

 which do not eliminate so much. 



Q. How do you account for the peculiar sensations of 

 heat in the different tissues? 



e#. Each has its peculiar heat, as it has of secretion. 

 All these varieties result from the modification of the 

 vital forces of the part. Animal bodies alone exhibit these 

 varieties of heat. 



Q. How is the heat increased in the action of fever? 



Ji. By the shock given to the capillary system, increas- 

 ing its- insensible organic contractility. 



Q. Why is heat increased by hurried respiration? - 



*ft. Because the circulation is likewise increased, and 

 consequently the vital forces of the capillaries. The ma- 

 terial of heat is more freely absorbed in hurried than slow 

 respiration. 



Q. Is all the heat of red blood lost in its change to 

 black blood? 



ft. It is not; hence in cases of sudden death from 

 asphyxia for example, heat remains some time after 

 death. 



Q. Why does heat remain longer in sudden than slow 

 death? 



/?. Because in sudden death the great functions are in- 

 terrupted, but the tonic forces remain for some time. 



