All living things break down food molecules, which releases energy and some of the energy is released as thermal energy, on the cellular level. All the trillions of cells making energy heat up the body. Our bodies being mainly composed of water, over 70%, helps mainly heat due to water's high specific heat capacity, and the little bit of fat also acts as an insulator. Hair helps keep by acting a barrier and numerous other way. On a small scale the body diverts blood flow from veins, arteries and capillaries that are close to the surface of your skin to reduce heat, and releases hormones to increase the breaking down of food and if your body gets cold enough, you will shiver causing your muscles to contract creating frictions which help warm up the body.
I hope that answers your question
keeps you warm (fat)
no. it keeps your body cool.
Your blood. :)
Yes it does. Just like a human shrivels up and keeps their body bunched together to keep them warm. It's vice-versa when warm
protects the body and keeps it warm
feather
No because their body fat keeps them warm.
Because it traps the heat that comes from your body from escaping, so you have more heat so it keeps you warm.
your skin is not what keeps you warm its your body temperature
keeps us warm by maintaining body temperature.
It depends, in general I would say body heat.
Lips or fats are needed so chemical processes can be complete. Also it cushions your organs, keeps you warm, and supplies energy.