Our temperature center is located in the brain, more precisely in the area of the hypothalamus. It regulates the body’s temperature as well as the feeling for heat and cold.
At cold temperatures the body has a special protective function: One of the first actions the hypothalamus takes: It tightens the blood vessels in your arms, hands, feet, and legs. The blood circulation focusses on the vital organs such as heart, brain, kidneys and digestive organs. At the same time the circulation of the bodyparts, the furthest away from the torso, decreases - the so called "acra".