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Wearing a hat on a cold, blustery day is using your noggin, because 30 percent to 50 percent of body heat escapes through the head. And that means…?
The loss of too much body heat can lead to hypothermia. That’s a dangerous drop in body temperature that can result in frostbite, shock, even death. So why is the head like an open window in the house of the body?
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Muscle and fat help the body maintain its normal temper-ature. There’s not a lot of either in the head. But there are blood vessels through which heat escapes (ditto fingers and toes). So the next time your parents tell you to wear a hat “just because,” you can tell them what for. Literally.