encyclopedia of medical concepts
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Myofibrils
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Definition
: The long cylindrical contractile organelles of STRIATED MUSCLE cells composed of ACTIN FILAMENTS; MYOSIN filaments; and other proteins organized in arrays of repeating units called SARCOMERES .
See Also
Muscle Contraction
Examples
Sarcomeres
Other names
Myofilaments; Myofilament; Myofibril