Inner Enamel, Rat (IMAGE) Northwestern University Caption This is a scanning electron microscope image of inner enamel from the rat incisor. Credit Credit: Northwestern University Usage Restrictions Credit must accompany use of image 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.