The organ, from a genetically modified animal, failed because of a lack of blood flow, surgeons said, but did not appear to have been rejected by the body. The organ, from a genetically modified animal, failed because of a lack of blood flow, surgeons said, but did not appear to have been rejected by the body. your-feed-science, Kidneys, Genetic Engineering, Pigs, Medical Devices, Implants, Heart, Surgery and Surgeons, New York University Langone Health NYT > Science