Transformed Cells (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption This cross-section of skin shows rat thymic epithelial cells (green) contributing to hair follicles and sebaceous glands. Credit EPFL Usage Restrictions Credit: EPFL 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.