TEL AVIV, ISRAEL - APRIL 15: A scientiest presents a 3D printed heart made from human tissue in Prof. Tal Dvir's laboratory in Tel Aviv University on April 15, 2019 in Tel Aviv, Israel. Israeli scientists in Tel Aviv have created a human heart that completely matches all the anatomical properties of a human patient using a 3D printer. This is believed to be the first time an entire heart with cells, blood vessels, ventricles and chambers has been reproduced in this way. (Photo by Amir Levy/Getty Images)