This is a picture of a human being, my sister, drinking a glass of water. It is an example of homeostasis. Homeostasis is the tendency of body to maintain and keep stable internal conditions. In this picture, my sister is returning to homeostasis. She is drinking water to return to the condition she was in before sweating. The body gave her a headache to warn her of her dehydration so that it could get water to get back to homeostasis. If she was cold, her body would shiver. If she was too hot, her body would sweat to cool off.
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