I personally feel that the electrical energy contained in the body can be referred to as soul .As energy can neither be created nor destroyed but can be transformed from one form to another so immortal like soul as stated.
And sir, where from does this electrical energy enter into the body and whence does it exit? If the explanation is so simple, why can't man create life? We have all the ingredients to make a cell but alas, we cannot instill life into it!