Animal Remains in Iceman's Stomach (IMAGE) Cell Press Caption This image shows wo large bundles of muscle fibers. Confocal laser scanning microscopy image. The scale bar indicates 1mm. Magnified image of one muscle fibre bundle. The scale bar indicates 20μm. The long cylindrical unbranched muscle cells often appear in bundles and still display striated fiber structures running perpendicular to the long fiber axis characteristic for cardiac and skeletal muscle tissue. Credit Institute for Mummy Studies\Eurac Research\Frank Maixner Usage Restrictions Credit Required. 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.