Skin of Young Mouse (IMAGE) Center for Genomic Regulation Caption Skin of a young mouse. The image shows a cross section of the skin with the fibroblasts indicated in green. The thickness of the dermis and the density of fibroblasts is much greater in young skin than in aged skin- cell nuclei, in blue. Credit M Salzer, IRB Barcelona Usage Restrictions CC-BY 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.