American scientists are seeking to make pig livers behave more like human livers so they can be transplanted into people. The reengineered livers could help fill a big need for replacement organs. The first step for scientists is to wash away the pig cells that help the organ do its work. This leaves the liver white and clear, with no blood vessels remaining in the tissue. Next, human liver cells are added to the empty pig liver. The living cells move throughout the organ in an effort to restart the liver’s functions. Jeff Ross is head of the U.S.-based Miromatrix, the medical company involved in the research. He told The Associated Press, "Because we remove all the cells from that pig organ … our bodies don't see it as a pig organ." He explained that the process can nearly “regrow the organ.”