Sorry if this is a dumb question, recently I have been interested in the question of how "life" should be defined and got a specific question:
If we compare a live body of a person and a dead body of someone who just died, what is the difference in term of their molecule? Say for example, when the heart stops beating, the blood won't cycle through the body, but if we focus on individual cells, say the blood cell, which has hemoglobin molecules, it stops carrying oxygen when the person dies, but if we dig further, the hemoglobin molecule is defined as:
A hemoglobin molecule is made up of four polypeptide chains, two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each.
A bit more further we would reach the microscopic world, where there are atoms, protons, electrons, etc, AFAIK, these things would still obey the rule of thermal motion, although the motion may be less active due to the reduced temperature of the dead body.
So from the atom's perspective, what is the difference between a live person and a dead body?
Thanks and sorry again for this dumb question!