Jan Huisken (IMAGE) Morgridge Institute for Research Caption Medical engineer Jan Huisken holds a tank of zebrafish at the Morgridge Institute for Research. Zebrafish are a commonly used model in science, and Huisken's work has a special focus on the cardiovascular system and endoderm. Credit Morgridge Institute for Research 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.