The Platynereis dumerilii vascular system in three segments (IMAGE) CNRS Caption The Platynereis dumerilii vascular system in three segments Credit © Song et al. / BMC Evolutionary Biology Usage Restrictions None 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.