Immune Cells Surveying a Mammary Duct (VIDEO) Walter and Eliza Hall Institute This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Immune cells called macrophages ('big eaters') are important for mammary gland formation and function. This is a movie of a mammary gland duct (purple), surrounded by collagen fibres (pink) and macrophage populations (yellow and blue). The yellow macrophages are breast-specific ductal macrophages ('DMs') that live on the ducts and survey the epithelium with their arms. Credit Dr Caleb Dawson, Walter and Eliza Hall Institute of Medical Research Usage Restrictions with credit to Dr Caleb Dawson, Walter and Eliza Hall Institute of Medical Research 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.