Fluidic devices and assemblies are disclosed to allow flow of fluid between the plurality of wells. By making it possible to measure the integrated tissue responses initially isolated tissue cultures linked by the fluid flow, the fluid device and assembly that mimic the in vivo tissue environment is provided. Fluid unit and assembly provides tension, gravity, and a pump-less system using the geometry of the channel. By linking the human tissue function system to better simulate the in vivo feedback and response signals between tissues, it is possible to minimize the need for studies in animals.
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