(IMAGE) Max-Planck-Gesellschaft Caption Neuronal chart: the visual system of 3-day old bristle worms consists of 71 neurons which are connected by more than 1000 synapses. Credit Max Planck Institute for Developmental 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.