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myofilaments in a striated muscle myofilaments in obliquely striated muscle striated muscle; human biceps muscle ultrastructure of a group of myofibrils
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Z line

physiology

Learn about this topic in these articles:

structure of muscle tissue

  • striated muscle; human biceps muscle
    In muscle: The myofilament

    …prominent dense line called the Z line, although in reality, considering the three-dimensional structure of the myofibril, it is more appropriate to speak of Z disks. The area between two Z lines, a sarcomere, can be considered to be the primary structural and functional unit directly responsible for muscle contraction.…

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