According to the Law of Conservation of Energy, all energy within a closed system is constant...
...Wounding is caused by energy transfer, and it cannot happen any other way.
I agree but I would like to point out that because a bullet does not exit you cannot assume that all its energy has been transfered to the animal, as a substantial part of the energy the bullet carries may be spent in the bullet deformation/fragmentation.
Also, you cannot assume that all the energy that is transfered to the animal is spent in destroying tissue as, again, a substantial part of its energy maybe wasted in the form of heat transfered to the animal with no lethal effect whatsoever.
BBerg
