Fig. 1From: Construction of in vitro 3-D model for lung cancer-cell metastasis studySchematic images of the 3-D microfluidic system for in vitro culture model. Hundreds of micro-chambers are constructed within the collagen hydrogel for mimicking the pulmonary gland or alveoli. Bottom right image shows the cells cultured within the micro-chamber arrays. Scale bar is 200 μmBack to article page