MAKE their own body heat. Birds and mammals are warm-blooded.Cold-blooded animals are those whose body temperature DEPENDS on the temperature outside.Fish, reptiles, and amphibians are all cold-blooded.Warm-bloodedCold-bloodedApesTurtleMonkeysSnakeCatFishMiceFrogs ThermoregulationThermoregulation is the ability of an organism to maintain a core body temperature, which is 37° C (98°F) within an optimal PHYSIOLOGICAL range.The hypothalamus, a portion of the brain which plays an important role in regulating body temperature by acting as a thermostat.Thermoregulation is also called heat regulation.Ectothermic AnimalsThey are commonly called cold-blooded animals.They gain most of their heat from external sources.They produce a very less amount of heat to KEEP their body warm and have a low metabolic rate. Examples of ectothermic animals include amphibians, fish, lizards, other reptiles, etc.Endothermic AnimalsThey are commonly called warm-blooded animals.They develop most of the heat mainly from their body’s METABOLISMS and produce a required amount of heat to keep their body warm.These animals have a very high metabolic rate.Examples of Endothermic animals include all mammals and birds.