Fig 2. Characterization of the intestinal epithelium on the organ-on-a-chip platform. (A) Microscopic bright field image (Scale bar: 100 um), (B) side HE staining image (Scale bar: 100 um) and (C) SEM image (Scale bar: 10 um) of chip without (up) /with (down) fluidic force provided by rocker. (D) Live/Dead staining in static chip and perfused chip (Scale bar: 100 um). (E) Cell activity in static chip and perfused chip by CCK-8 kit. (F)Permeability test by detecting the fluorescence intensity of FITC-Dextran crossing through the cell layer within a certain time.(G) The TEER value of static chip (red) and perfused chip (black).