Homeotherm

Homeotherm is an organism that maintains its body temperature at a constant level, usually above the temperature of its surroundings, by its metabolic activity. This is in contrast to poikilotherm organisms, which do not have constant body temperatures.

Overview

Homeotherms, also known as endotherms, are capable of internal generation of heat to maintain body temperature. This is achieved through a variety of physiological and behavioral adaptations, including insulation, fat storage, and metabolic heat production. Homeotherms include mammals and birds, and to a lesser extent, certain fish and insects.

Characteristics

Homeotherms have a number of characteristics that distinguish them from other organisms. These include:

• High metabolic rate: Homeotherms have a high metabolic rate, which allows them to generate heat internally. This is in contrast to ectotherms, which rely on external sources of heat.

• Thermoregulation: Homeotherms are capable of maintaining a stable internal body temperature regardless of external conditions. This is achieved through a combination of behavioral, physiological, and biochemical mechanisms.

• Insulation: Homeotherms have various forms of insulation, such as fur, feathers, and fat, which help to retain body heat.

Advantages and Disadvantages

Homeothermy has several advantages, including the ability to remain active in a wide range of environmental conditions, and the capacity for high levels of sustained activity. However, it also has disadvantages, such as the need for a constant supply of food to fuel the high metabolic rate, and the risk of overheating.

See Also

• Endotherm
• Ectotherm
• Poikilotherm
• Thermoregulation

References

Homeotherm Resources
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