Skeletal Muscles

Skeletal Muscles

Author: Aaron Mullally

This lesson will describe the structure and function of skeletal muscles.

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Skeletal Muscle Structure

Source: Skeletal muscle image, Creative commons: http://en.wikipedia.org/wiki/File:Skeletal_muscle.jpg; Skeleton model, Aaron Mullally

  • Skeletal muscle

    a form of muscle that contains very long, striated, multinucleated cells; skeletal muscles are the largest form of muscles in the body and attached to the skeleton; these are used for the movement of our bones, generate heat and protect deeper internal organs; skeletal muscles are also the most abundant type of muscle found in the human body

  • Myofibrils

    long chains of contractile proteins called myofilaments that are located within muscle cells (myocytes)

  • Origin

    a tendon that fixates the muscle to the bone; stationary end of the muscle that performs little to no movement

  • Insertion

    a tendon that fixates the muscle to the bone; highly moveable end of muscle that performs most of the work as a muscle contracts