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- The ability of an organism to maintain a constant internal environment
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- Regulation of body temperature at 37 degrees celcius
- Regulation of pH of blood at 7
- Regulation of glucose in blood
- Preventing waste building up (excretion)
- Ensuring oxygen levels are sufficient (lungs)
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- Organisms that have the ability to maintain a constant internal temperature despite external conditions
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- Humans
- Mammals
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- Vasoconstriction
- Piloerection
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- Vasodilation
- Sweating
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- Organisms that do not have the ability to maintain a constant internal temperature and rely on their environment for heat
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- Frogs
- Lizards
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- Lie on rocks to absorb heat from the sun throughout the day
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- Hide in the shade