Liver
your head
yes because the part of your body that produces semon is part of the coldest part of your body so most likey it wont heat up
filament
Most heat exits the head, most of the rest is through water sweated through the skin.
The ovaries.
nose
the core
The body itself but too much can slow them down or kill them. That is why the testicles are held in the scrotum. They can be lifted toward the main part of the body to keep warm and be dropped down if the body is too warm.
The nervous system, especially the brain, produces endorphins.
the heart
The mammalia,or breasts.
In most energy conversions, part of the energy will be converted to heat. That is usually unwanted, since energy is wasted, and the heat itself may also be problematic.