A warm-blooded animal is an animal that almost always has about the same body temperature, regardless

 of the temperature of its surroundings. Birds and mammals, including human beings, are warm-blooded
animals.  Nearly all other kinds of animal are cold-blooded. The body of a warm-blooded animals produced heat by burning food. Shivering and physical activity also generate body heat. Young warm-blooded animals and some adult small mammals have heat. Young warm-blooded animals and some adult small mammals have heat-producing organs, called brown fat, on their neck, chest, and back. A layer of fat beneath the skin,plus a covering of hair, fur, or feathers, helps keep a warm-blooded animal warm. The body becomes cooler by such means as panting and sweating.