There is a biochemical and anatomical difference. Exhausted would implies that there is no available energy for the task at hand and enervated would suggest that the intended task lack the nervous potential to be actuated. That said, in popular discourse, there is not much difference between the two.
Systems theory has also been developed within sociology. An important figure in the sociological systems perspective as developed from GST is Walter Buckley (who from Bertalanffy's theory). Niklas Luhmann is also predominant in the literatures for sociology and systems theory.
Functional Theory: - Functional theory is a perspective that maintains that a society as a whole is a sum of its parts; that each part is functioning in a manner conducive towards the stability of the society at large.unctional Theory: - Functional theory is a perspective that maintains that a society as a whole is a sum of its parts; that each part is functioning in a manner conducive towards the stability of the society at large.