Apparatus and methods for beaming some or all payload component loads out to surrounding support structure and adaptably coupling payload assemblies to a support structure are disclosed. A rear end portion of an upper portion cushion member and a lower end portion of the seat backrest are superposed together. A microfluidic device 101 includes microchips 106 through 108 of plural kinds having passages 132 through 134 for transporting a sample, and a base member 102 on which the microchips 106 through 108 are arranged.