Endotherm

Endotherm is a term used to describe organisms that generate heat to maintain their body temperature, typically above the temperature of their surroundings. This is in contrast to ectotherms, which are dependent on external sources of heat to regulate their body temperature. Endotherms include mammals and birds, while ectotherms include most fish, reptiles, and invertebrates.

Characteristics of Endotherms

Endotherms have the ability to maintain a stable internal body temperature regardless of external environmental conditions. This is achieved through a variety of physiological and behavioral adaptations, including a high metabolic rate, insulation (such as fur or feathers), and behavioral strategies like basking or huddling.

Advantages and Disadvantages of Endothermy

Being an endotherm has several advantages. It allows for greater activity levels in cold environments, and enables survival in a wide range of habitats. However, it also has its disadvantages, such as the need for a high caloric intake to sustain the high metabolic rate.

Examples of Endotherms

Examples of endotherms include all mammals and birds. Some fish, such as the tuna and certain species of shark, are also endothermic.

See Also

• Ectotherm
• Homeostasis
• Thermoregulation

References

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Endotherm

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  Homeothermy-poikilothermy
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  Thermal Regulation Graph