While 3D bioprinting and bioassembly continue to revolutionize tissue engineering in the fields of generative and restorative medicine, the creation of biocompatible organic implants is still a virtually uncharted field. Indeed, it is still very difficult to reproduce the complex structure of tissue interfaces and vascular perfusion. A team from the Jacobs School of Engineering at the University of California in San Diego and Sichuan University of China succeeded in printing a biocompatible blood vessel. Their study, entitled “Direct 3D bioprinting of prevascularized tissue constructs with complex microarchitecture,” was published in the Biomaterials Journal on February 2, 2017. It was co-written by Wei Zhu, Xin Qu, Jie Zhu, Xuanyi Ma, Sherrina Patel, Justin Liu, Pengrui Wang, Cheuk Sun Edwin Lai, Yang Xu, Kang Zhang and Shaochen Chen.