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All mammals are "warm-blooded," although that term is a little confusing. Any animal's blood is warm if the animal is warm (as if it's been lying in the sun, say). Mammals (and birds) are warm-blooded ALL THE TIME because they burn food to keep their body temperatures at a predetermined point (for people, around 37 degrees C). As a consequence, mammals (and birds) need proportionately more food than reptiles or fish of the same weight.

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13y ago

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