I have a special Hearty Friday for you today. Recently, there was a very cool paper published in Nature by some people at the University of Minnesota, Harvard, and several other institutions.
I plan to review this article at some point, but for now, here’s a picture of their recellularized scaffold. That is, they took an animal heart, washed all of the cells out, leaving the fibrous scaffold, and put cells back in, letting them grow back into a beating “heart”. This is snapped from Figure 4 of their paper.