Rosette (1 of 3) (image) University of Cambridge Caption The mouse embryo's own stem cells organize themselves into a rosette-like arrangement as a pre-requisite for laying the foundations for the body when the embryo would implant into the uterus. Credit Magdalena Zernicka-Goetz and Ivan Bedzhov Usage Restrictions Photo can be used with credit. 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.