Fig. 8.

(A) Vascular structures fabrication using agarose as sacrificial material (reproduced with permission from [14], Copyright 2009 Elsevier); (B) Vascular network printed in suspended hydrogel (reproduced with permission from [54], Copyright 2015 Hinton et al.); (C) 3D bioprinting whole heart containing major blood vessels (reproduced with permission from [21], Copyright 2019 Noor et al.); (D) Nanoclay and GelMA hybrid bioprinting complex structures (reproduced with permission from [64], Copyright 2019 IOP Publishing Ltd.).