Why are we "hot blooded"? Or, how?

Question

I would like to know what is the process to make our blood warm that "cold blooded" animals don't have. I would like to know the systems involved. Thanks!

Answer 1

Endothermy is the ability of some creatures to control their body temperatures through internal means such as muscle shivering, fat burning, and panting (Greek: endo = "within," therm = "heat"). Some writers restrict the meaning of "endothermy" to mechanisms which directly raise the animal's metabolic rate in order to produce heat. The opposite of endothermy is ectothermy.
Homeothermy is thermoregulation that maintains a stable internal body temperature regardless of external influence. This temperature is often higher than the immediate environment (Greek: homoios = "similar," therm = "heat"). The opposite is poikilothermy.
Tachymetabolism is the kind of thermoregulation used by creatures that maintain a high resting metabolism (Greek: tachy = "fast, swift," metabol = "to change"). Tachymetabolic creatures are, essentially, "on" all the time. Though their resting metabolism is still many times slower than their active metabolism, the difference is often not as large as that seen in bradymetabolic creatures. Tachymetabolic creatures have a harder time dealing with a scarcity of food.