Smart Miniature Pump (IMAGE) Fraunhofer-Gesellschaft Caption The novel micro-pump works in a similar way to the human esophagus: The liquid is ingested from the left (above), propelled forward by contractions of the pump (center) and released on the right (below). Credit Fraunhofer IWM Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.