The terms "endothermic" and "ectothermic" apply to animals, which can be categorized based on their temperature regulation methods. Endothermic animals, commonly known as warm-blooded animals, can internally regulate their body temperature through metabolic processes, regardless of the external environment. In contrast, ectothermic animals, or cold-blooded animals, rely on external environmental temperatures to regulate their body heat. This distinction affects their behavior, habitat preferences, and energy usage, demonstrating different adaptations to their ecological niches.