thermoregulation. homeostasis. body temperature regulation

thermoregulation homeostasis body temperature regulation skin blood vessel hypothalamus heat production loss thermal balance sweating vasodilation vasoconstriction shivering evaporation conduction convection hyperthermia hypothermia thermoreceptor autonomic nervous system sympathetic adaptive thermogenesis regulation vessels dilate sweat glands cool vector anatomical structure muscle cell shaft follicle epidermis perspiration human hair diagram body arrector pili