I've been doing a little research into endothermy, and I found out that most of the heat our body uses to keep us warm comes from things like the heart, liver, brain, and skeletal muscles.
But every cell in our body that uses ATP is technically producing heat. And bones have cells. So they must produce heat, too, right? Probably marginal amounts, but they must do it?
And I'm mostly wondering about the harder parts of our bones, since I assume our bone marrow produces some amount of heat when it's making blood cells. #animals