Hair First, Sweat Later (image) Rockefeller University Share Print E-Mail Caption Researchers found that two opposing signaling pathways guide the formation of hair follicles and sweat glands. In humans, hair follicles emerge first (pink), followed by sweat glands (arrowhead). Credit Laboratory of Mammalian Cell Biology and Development at The Rockefeller University/Science Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. Share Print E-Mail 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.