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Skeletal Muscles loading

Skeletal muscles are comprised bundles of muscle fibers. Muscles can only contract and must work in pairs.

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Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Video
    The Human Body

    The Human Body

    by CK-12 //basic
    This link brings you to a YouTube Playlist of five sequential videos on the human body.
    This indicates how strong in your memory this concept is
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