Earthworm muscle drives on-chip valve (video) RIKEN Share Print E-Mail Loading video... Caption Video showing the flow of fluorescently labeled microparticles through a microchannel on the chip. At 10 seconds, acetylcholine is applied and the valve begins to close. At this time the flow reverses due to pressure, and is completely stopped by 47 seconds Credit RIKEN Usage Restrictions credit RIKEN Share Print E-Mail 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.