Systems and methods place a first structure and a second structure in or on different tissueregions for magnetic interaction. The first structure comprises at least oneferromagnetic component, and the second structure comprises an array of magneticcomponents. The first and second structures are separated during use by a distance,which is defined as a separation between the centers of mass of the ferromagneticand magnetic components. The distance varies within a working range as a resultof native movement of the tissue regions on which the first and second structuresare placed. The systems and methods titrate the size and orientation of the magneticand ferromagnetic components to maintain a relatively constant magnetic fieldbetween the two structures within the working range, thereby accommodatingrelative movement of the tissue regions in the normal performance of bodily functions.
