This means they can regulate their own body temperature internally, maintaining a stable core temperature even when the external environment changes. They achieve this through:
* Metabolic processes: Mammals have a high metabolic rate, generating heat through cellular respiration.
* Insulation: Fur, feathers, and blubber help trap heat and reduce heat loss.
* Physiological mechanisms: Shivering and sweating are examples of physiological responses that regulate temperature.
Therefore, mammals are able to thrive in a wide range of environments, unlike ectothermic animals (like reptiles) who rely on external sources of heat.