The difference lies in how they control body temperature. Cold-blooded animals depend on the environment, while warm-blooded animals maintain a constant body temperature.

Key Points

• Cold-blooded (ectotherms): Body temp changes with environment (e.g., fish, reptiles, amphibians).
• Warm-blooded (endotherms): Maintain stable body temp using internal regulation (e.g., mammals, birds).
• Adaptation: Cold-blooded are more energy-saving, warm-blooded need more food.