JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Light micrograph of a cardiac muscle cell of the heart myocardium stained with Mallory's phosphotungstic haematoxylin. This cell has two central nuclei (binucleated) and peripheral striated myofibrils. Magnification: x900 when printed at 10 centimetres wide.
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