They don't. That is why they hibernate and lay out in the sun.
sunbathing
Burmese pythons are reptiles, and therefore cannot regulate their body temperature as we can. Their body temperature depends entirely on their environment.
it is an animal that's body temperature varies according to the temperature of its surroundings mainly fish and reptiles, it does not apply to birds or mammals as they are able to regulate there body temperature, were as reptiles for example will be the temperature of there surrounding this is why they have to bask in the sun to get warm.
Birds and mammals are endothermic organisms, meaning they can regulate their body temperature internally. This is in contrast to ectothermic organisms, like reptiles and amphibians, which rely on external sources to regulate their body temperature.
Reptiles are poikilothermic, poikilothermic means that they can not regulate heat internally.This is why they are cold blooded and need to bask in the sun regularly to maintain body temperature
Fish and reptiles both regulate their body temperature behaviorally by going to areas where the temperature fits their biochemical needs, eg. sunning on rocks to raise temperature, etc. Some fish and reptiles also hibernate when temperatures get too cold.
They're cold-blooded and can't regulate it themselves
Reptiles are cold blooded and require the atmospheric heat to regulate their internal body temperature. If the outside temperature were to decrease by 20 c the internal temperature of the reptile would decrease 20C.
They are all reptiles, so reptiles and amphibians, as the two groups are usually lumped together.
Antarctica. It's too cold for cold blooded animals to regulate their body temperature
Reptiles are cold blooded (cannot regulate body temperature) animals. Reptiles are vertebrates (with a backbone). Their bodies are covered with scales or scutes. They lay eggs. Reptiles skin is tough, rough and scaly.
Ectothermic organisms, such as reptiles and amphibians, have body temperatures that fluctuate with changes in environmental temperature. They rely on external sources of heat to regulate their body temperature.