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What's the difference between cold and warm blooded animals?

Cold-blooded animals are not able to regulate internally their body temperatures -- their body temperature tends toward the temperature of their surroundings. Warm-blooded animals are able to maintain a certain body temperature over a wide range of temperatures in the environment. Warm-blooded animals are able to do this by regulating the rate of metabolic heat production and the rate of heat loss. For example, hair and body fat help to insulate the body to slow heat loss, and evaporation of surface moisture cools the body.


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