Withoutareleaseofenergytherewouldbeabsolutelynocharacteristicsofanykind.Soourdigestiveprocessconstitutessimplythereactionsofvarioussubstancestoeachotherwithinourorganism.

Please segment the words:
Without a release of energy there would be absolutely no characteristics of any kind. So our digestive process constitutes simply the reactions of various substances to each other within our organism.