Femur (IMAGE) North Carolina State University Caption Researchers found that the heavier an individual was, the wider the shaft of that person's femur. Credit Dr. Ann Ross, North Carolina State University Usage Restrictions Image credit must be given. 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.