Homeostasis - the ability of an organism to maintain stable internal conditions, Organism - any living thing, When you exercise, your heart rate will - increase so it can pump more blood to your body, When you exercise, you will sweat - this is so your body can cool down and return to it's "normal" temperature, When you exercise, your breathing will - increase so your body can get more oxygen into your blood, When a worm is outside too long in the sun, - it will go into the shade to cool down., You shiver when you go outside in the cold - this is because your body is going to increase your body temperature, Stimulus - something that causes a change in a system,

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