Microfluidic device and its submicrostructures.

<p><b>(A)</b> Assembled microfluidic device with connected inlet and outlet tubings. <b>(B)</b> Parallel cultivation chamber arrays with branched main channels that subdivide in smaller channels for media perfusion. A a single device contains four cultivation chamber arrays with 352 chambers each. <b>(C)</b> Microcultivation chamber. <b>(D)</b> SEM micrograph of a cultivation chamber.