Type of Blood
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Cold-blooded animals are those whose body temperatures are regulated by their environment, and warm-blooded animals are those whose body temperatures are kept relatively constant by internal mechanisms. Along with the way their body temperatures vary, another main difference between these types of animals is that warm-blooded animals require more food. The terms "cold-blooded" and "warm-blooded" are misleading because cold-blooded animals' blood is not necessarily cold, it just varies based on the temperature of the environment. More accurate terms are "ectothermic" instead of "cold-blooded" and "endothermic" or "homeothermic" instead of "warm-blooded." Another term for ectothermic animals is "poikilotherms," which means animals that have varying body temperatures
copied from: http://www.wisegeek.com/what-is-the-difference-between-warm-blooded-and-cold-blooded-animals.htm
copied from: http://www.wisegeek.com/what-is-the-difference-between-warm-blooded-and-cold-blooded-animals.htm