CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Cardiac muscle, light micrograph. The heart largely consists of fibres (red) of cardiac muscle (the myocardium) that contract to pump blood around the heart. This is a longitudinal section through the myofibrils, with the round areas being the cell nuclei, and the dark bands being intercalated discs. The stain used is trichrome blue.
Model release not required. Property release not required.