Heart muscle cell, TEM

Heart muscle cell, TEM

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Credit: MEDIMAGE/SCIENCE PHOTO LIBRARY

Caption: Heart muscle cell. Coloured transmission electron micrograph of a heart muscle cell (cardiomyocyte), showing enormous numbers of mitochondria (green), required for a constant energy supply to sustain heart muscle contractions. Myofilament proteins (cream), made up of mysosin and actin, enable the muscle to contract. All cardiomyocytes are joined end-to-end by special intercellular junctions. Gap junctions enable cell-to-cell electrical conduction which is the basis for the coordinated and rhythmic contraction of heart muscle.

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Keywords: actin, anatomical, anatomy, biological, biology, cardiac muscle, cardiac muscles, cardiomyocyte, cell, cell biology, coloured, cytology, false-coloured, gap junction, gap junctions, healthy, heart, heart muscle, heart muscle cell, histological, histology, human body, microscope, mitochondria, mitochondrion, muscle cell, myofilament, myofilaments, myosin, normal, striated muscle, striated muscles, striatum, tem, transmission electron, transmission electron micrograph

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