In what the Israeli media is calling a "world's first," scientists at Tel Aviv University have 3D printed a small heart using human tissue that includes vessels, collagen, and biological molecules - a breakthrough, according to Haaretz, that they hope could one day render organ donation obsolete. To print the heart, the scientists created a "personalized hydrogel" to form "bioinks," according to a paper published today in the journal Advanced Science. Read full article...
Source: https://www.sciencealert.com/researchers-have-just-3d-printed-a-mini-heart-using-human-tissueThe article states that the cells contracted, but, did not do so in unison fashion. Do you have the link to the actual paper?