Connective Sheath (IMAGE) Brown University Caption In this electron microscope image of fish muscle, the muscle fiber is removed showing the mesh of surrounding connective tissue. Credit David Sleboda/Brown University Usage Restrictions with credit 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.