Do you know why your teeth chatter when you are cold? Its because are body tries to keep it 98.6 degrees. When your body gets colder than that, your brain gives a message to your muscles to start shivering so it will warm up and your teeth start chattering.
When you your body is too hot, then your brain tells your skin to start sweating. The sweat cools us off in two ways:
1) It Evaporates and carries the water that got heated from your body and it takes away the heat.
2) When you sweat and the wind starts blowing the sweat it acts like an air conditioner.
When you sweat you lose water so you should keep drinking since our bodies are 60 percent water.
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