On day 197 of #LMB365 we have a picture by Katja Röper in the Cell Biology Division. This image shows a confocal section of the primordium of the salivary glands in a Drosophila embryo, a model system for the formation of tubular organs. The Röper lab studies how important tubular organs from flies to humans form during development. The image is false-coloured with cell outlines labelled blue.