First off, we can't print out any full organs as of the moment, just scraps of tissue. Bio-printers able to handle simple functional organs are on the horizon, but won't be around for a decade or more.
Secondly, the structures we can manage to make via 3d printing are very simple in form. More complex structures such as cardiovascular muscle tissue, much less that of the brain, are far beyond anything we can reliably predict being able to manage.
It is theoretically possible that one day we will be able to 3D print a full body a la that one scene in the old classic "The Fifth Element", but I don't care to speculate about future tech when the variables are that uncertain.