Blastoid (IMAGE) Rockefeller University Caption A blastoid, a stem cell model system that allows scientists to study the nuances of human gastrulation. Credit Laboratory of Stem Cell Biology and Molecular Embryology at The Rockefeller University Usage Restrictions Image may only be used to illustrate research described in the accompanying release. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.