Heart Muscle Cells (image) University of Southern California - Health Sciences Share Print E-Mail Caption These are heart muscle cells (red) with nuclei (blue). On the far right is a regenerative cell, which only has one nucleus, called a mononuclear diploid cardiomyocyte. Credit Image by Michaela Patterson/USC Usage Restrictions None 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.