A fluidic testing platform and methods of its operation are described. The fluidic cartridge includes a first fluidic channel and a wheel assembly coupled to the first fluidic channel. The wheel assembly includes a center portion coupled to the first fluidic channel and designed to deliver fluid through one or more second fluidic channels that radiate outward from the center portion. The wheel assembly also includes a third fluidic channel arranged in a closed loop and one or more capillaries coupled to an outer surface of the third fluidic channel and arranged to radiate outward from the center portion. The wheel assembly is designed to rotate such that fluid is forced outward from the center portion through the one or more capillaries.
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