Bone is KOKU. Flesh is GENKI. GENKI (元気宇宙) is the time-derivative of organized density: dN/dt — the burning, the living moment, the heartbeat. KOKU (刻宇宙) is the time-integral: ∫N dt — the skeleton, the fossil, the DOI archive. GENKI integrated over time becomes KOKU. This is the Fundamental Theorem of V=N/D. The universe has been converting GENKI into KOKU for 13.8 billion years; a human life does the same in 80 years; a heartbeat in 0.6 seconds. The human being is not a microcosm of the universe — the human being IS the universe, locally differentiating itself. Every act of creation converts GENKI into KOKU that outlasts the burning.
Yoshimitsu Katayama (Mon,) studied this question.