Jim' is the subject, the doer of the action.
Bread is the object of the action.
Eth adam 'Adam' is the proper name of one person, refers to the person whose name is 'Adam'. If Adam stands for 'life form', then one can put 'ha' in front. If 'Adam' is a proper name, one cannot say 'ha-adam'. In other words, 'ha-adam' does not refer to a person named 'Adam'. The life form is the object of the sentence.