Fig. 2. The procedures of vascular organoids. Co-culturing with embryonic or adult stem cells, endothelial cells and mesenchymal cells, vascular organoids are generated after transplantation (top); On some occasions where there are urgent for the vascular networks, it can be constituded well ex vivo following the steps (medium); As for diseases, blood vessels organoids are masterpieces, in addition to some cytokines and small molecules to form the stem cells niche, it can be generated (bottom).