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musculoskeletal system

the bones and voluntary muscles of the body.

skeletal muscle

muscle that is attached to bones and usually crosses at least one joint; striated, or voluntary muscle

voluntary muscle

muscle that is under direct voluntary control of the brain and can be contracted or relaxed at will; skeletal or striated muscle

smooth muscle

nonstriated, involuntary muscle; it constitutes the bulk of the gastrointestinal tract and is present in nearly every organ to regulate automatic activity

involuntary muscle

muscle over which a person has no conscious control. it is found in many automatic regulating systems of the body.

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