The hypothalamus is the part of the brain in charge of thermoregulation and is often referred to as the body's thermostat. The hypothalamus has messengers all around the body that sense temperature changes and report back. When the thermostat senses the body is getting too hot, it sends signals to areas responsible for sweating, activating our built-in cooling system. Likewise, when the body gets too cold, the hypothalamus triggers shivering, trembling, and the pumping of blood to the internal organs to keep them protected from the cold.
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