JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Light micrograph of striated muscle fibres of the heart myocardium stained with the Pasini method. There is a single central nucleus and peripheral striated myofibrils. The intercalated disks are stained light blue. Magnification: x900 when printed at 10 centimetres wide.
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