And importantly, I need to precisely define the concepts. Starting with the concept of error. Presumably, errors are mutations in genetic structures, trash or errors. Enzymes would be a large category and reservoir of errors. Errors of mutations in posphorylation, in Krebs cycle, in the numerous other cycles.
Skin gets floppy and loses elasticity.
Muscle and bone degradation. These are noticable and obvious body detioration. Biology theory of errors follows analogously to wear and tear in physics. In physics we would have a theory of errors with the mechanism of Friction as the culprit. In biology the mechanism I suppose would be also friction but is quantifiable in terms of Mutations.