BLT Humanized Mouse (image) University of North Carolina Health Care Share Print E-Mail Caption The humanized "BLT" mouse is created by introducing human bone marrow, liver and thymus tissues into animals without an immune system of their own. The BLT mouse has a fully functioning human immune system. Credit University of North Carolina School of Medicine Usage Restrictions May use with proper credit. 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.