MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
Light micrograph of striated (skeletal) muscle fibres from the human uvula, the conical fold of loose tissue that hangs at the top of the throat. This image shows striated muscle in longitudinal (bottom left) and transverse section (top right). Striated muscle cells are elongated, hence their description as fibres. Each cell has several nuclei (circular, darker stain) positioned just below the sarcolemma, the name given to the cell membrane of muscle cells. Running the length of each fibre are contractile protein filaments (actin and myosin myofilaments) arranged in bunches called myofibrils. Magnification: x300 at 6x7cm size.
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