How do humans keep warm?

Answer 1

Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment. To generate heat, warmblooded animals convert the food that they eat into energy. They have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature. Only a small amount of the food that a warmblooded animal eats is converted into body mass. The rest is used to fuel a constant body temperature.

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They also cover themselves in insulated, warm clothing and heat their dwellings with fire.

Answer 2

Humans keep warm by wearing appropriate clothing made of materials that trap heat close to the body, such as wool or fleece. The body also generates heat through metabolism, which helps to maintain a stable internal temperature. In extreme cold conditions, humans can use additional methods like layering clothing, using blankets, and seeking shelter to stay warm.