Exergy

Exergy is the amount of "workable" energy in a system. It is a measurement of the lack of equilibrium; it corresponds inversely with entropy. Regions of higher exergy are further from the zero state, with stronger magnitudes at each point.

Locally increasing exergy, such as through sequencing, results in an equivalent decrease of overall exergy within the system. Thus, exergy can only decrease with time.

Conductance

Exergy propagates at varying speeds. Most notably, it moves faster through bone and cirrolite, and slower through keratin. Propagation of exergetic change is limited by the speed of light within a vacuum.

Bone's conductance is due in part to its structure and in part to its composition, with hydroxyapatite being a core factor. Living and dead bone have no significant difference in conductance. Bone is very often used to facilitate changes or hold a charge in the field in components ranging from bone wands to bone capacitors. Meanwhile, fur is often used to protect systems from external changes.

Any living being with bones can sense exergy. Horns, teeth, and bone tools strengthen this sense.