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. 2018 May 31;19(6):1624. doi: 10.3390/ijms19061624

Figure 2.

Figure 2

3D bioprinted artificial trachea. (A) Longitudinal view, 15 mm in length; (B) Vertical view, five-layered structure with a 5-mm inner diameter and 10-mm outer diameter; (C) Magnified structure of the scaffold (SEM image). (a,c,e) layers are composed of PCL. (b) is alginate layer with MSC or d-MSC and (d) is alginate layer with epithelial cells. The innermost (e) and outermost (a) layers showed a microporous feature. The non-porous third layer (c) separates the epithelial cell layer (d) and the MSC or d-MSC layer (b). The scale bar indicates 200 µm.