Check out this video from Wyss Institute at Harvard University of how 3D bioprintinng of living tissues is done.
Accordinng to Wyss Institute, “Multidisciplinary research at the Wyss Institute has led to the development of a multi-material 3D bioprinting method that generates vascularized tissues composed of living human cells that are nearly ten-fold thicker than previously engineered tissues and that can sustain their architecture and function for upwards of six weeks.”
Check out the full article, here.