376 HUMAN PHYSIOLOGY 



the restriction of heat loss at such a time may lead to a rise 

 of the internal or true body temperature. In the chills 

 of malaria this is just what happens. The patient can 

 scarcely be made to feel comfortably warm because of the 

 severe constriction of the vessels of the skin. The sur- 

 face cooling leads to reflex shivering and the muscles 

 produce extra heat which is retained in the internal organs. 

 The temperature mounts high above the normal while 

 the sufferer appeals for more covering. Later, the skin 

 becomes flushed and the sensation is one of rising tem- 

 perature, though the fact is that the system is parting 

 with its stored heat and returning to the normal state. 



