JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Cross-sectioned striated muscle fibres of the heart ventricle, light micrograph. The cardiac myocytes have large irregular cells with a central nucleus and peripheral myofibrils. Mallory's phosphotungstic haematoxylin. Magnification: x900 when printed at 10 centimetres wide.
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