ABSTRACT
The vasculature is vital to the maintenance of a constant body temperature. Vasodilatation and vasoconstriction allow loss and conservation of body heat, respectively. The sweat glands, the hair and the subcutaneous fat are other parts of the skin that assist in thermal homeostasis. Evaporation of sweat assists loss of body heat, and the subcutaneous fat and hair help conserve heat because of their insulating functions.
