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Muscle contraction (sarcomere) HTML5


This animation presents muscle contraction at the level of the sarcomere by providing an animated schematic diagram in parallel with corresponding electron micrographs taken using a transmission electron microscope (TEM).
Photos:  © James E. DENNIS - PHOTOTAKE - ISM.

Learning goals

  • To understand the relationship between the structure of a sarcomere and its function.
  • To clarify  the principle stages of muscle contraction.
  • To bring out the relationship between the shrinking of I bands and the sliding of myofilaments.

Learn more

Locomotion is the result of the contraction of skeletal muscles.

The observation of a muscle fiber  under an transmission electron microscope (TEM) reveals alternating light and dark bands. The…

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