Mesodermal Layer (IMAGE) Salk Institute Caption The mesodermal layer, identified by ASM, will form bones, muscles, connective tissue and the middle layer of the skin. Credit Courtesy of Juan-Carlos Izpisúa Belmonte , from Cell Stem Cell, Oct. 1, 2009 Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.