An system and method for analyzing a biologic fluid sample is provided. The system comprises an analysis device, which includes imaging hardware, a programmable analyzer, and a sample motion system. The sample motion system includes a bidirectional fluid actuator adapted to selectively move a fluid sample block axially within the channel, and to cycle the block back and forth within the channel in a manner that at least substantially uniformly distributes constituents within the sample. The sample motion system is adapted to cycle the sample block within the channel at a predetermined frequency. The bidirectional fluid actuator is operable to move a fluid axially within the channel, and the moving fluid acts on the fluid sample block, so that the fluid sample block can selectively axially move and cycle within the channel. The bidirectional fluid actuator comprises at least one first piezoelectric bending disk.