Cells in Chicken Embryo (IMAGE) California Institute of Technology Caption This shows a slice through and embryo showing neural cells (red), neural crest cells (blue), and blocking agent (green). Credit Na Hu / California Institute of Technology Usage Restrictions Okay with credit. License Licensed 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.