Fig. 1.

(a) Schematic of the device to develop the air-liquid interface across the cells. The air (or epithelial) channel is separated from two fluid (basolateral) channels by pores. Right panel shows conceptual drawing of the proposed orientation of the cells when seen from top (above) and a cross-section (below). (b) Bright Field image of the fabricated device without cells and the magnified view showing the pores. (c) Fabricated device bonded to the glass coverslip with inserted tubing for perfusion.