Figure 4.

Macroscopic and microscopic analysis of 3D‐bioprinted constructs. A‐i) 3D printing of Alg/HAT/dAECM hydrogels into a tubular vascular construct (diameter: 1 cm). A‐ii) The translucent view of the graft before cross‐linking step A‐iii) turned into an opaque tubular structure upon incubation in an aqueous mixture of H₂O₂ and CaCl₂ at 37 °C. A‐iv) The emerged self‐supporting and mechanically robust scaffolds A‐v–viii)displayed high elasticity and shape‐memory property. B) SEM images showed that the grafts have a fused, homogenous, and round surface morphology in the inner and outer walls. In addition, the fibrous microstructure provided by dAECM is visible at higher magnifications. C‐i–iii)) Hydrogels with different geometry, size, and porosity can be constructed using the developed bioinks. C‐iv)The emerged biomaterials are highly elastic and suturable. D) The constructs obtained in various configurations and sizes exhibit the same fused, homogenous, and fibrous morphology.