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Ectothermic (sometimes confusingly known as "cold-blooded") refers to organisms that control body temperature through external means. As a result, organisms are dependent on environmental heat sources and have relatively low metabolic rates. For example, many reptiles regulate their body temperature by basking in the sun. Many ectotherms are more specifically poikilothermic.
- Jay M. Savage ; with photographs by Michael Fogden and Patricia Fogden. (2005). The amphibians and reptiles of Costa Rica : a herpetofauna between two continents, between two seas, Chicago, Ill.: University of Chicago Press.
- Milton Hildebrand; G. E. Goslow, Jr. Pprincipal ill. Viola Hildebrand. (2001). Analysis of vertebrate structure, New York: Wiley.
Thermoregulation in animals
Ectothermy · Endothermy