Fig. 4
From: Utilizing bioprinting to engineer spatially organized tissues from the bottom-up
Novel structure in nozzle for multi-material bioprinting. A Using spiral valve to mix different materials (from Chávez-Madero C, de León-Derby MD, Samandari M, et al. Biofabrication. 2020;12(3):035023 Reproduced under the terms of the Creative Commons Attribution 4.0 license.); B using co-axial nozzle to print different bioinks simultaneously (Reproduced with permission Copyright 2017, American Chemical Society)