smooth muscle fibres do not appear to be striated why ❓
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Striated or skeletal muscle fibres show this type of striations because of the organised arrangement of myofilaments. Cardiac muscles also show faint striations. But these striations are entirely absent in smooth muscle fibres because of the absence of angular arrangement of myofilaments.
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Smooth muscle lacks the striations of skeletal and cardiac muscle because the actin and myosin filaments are not regularly arrayed along the length of the cell. ... Smooth muscle cells are spindle-shaped, and they contain less myosin than striated muscle. Further, the myosin is not associated with specific actin strands....
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