muscular system

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Across
  1. 4. done, given, or acting of one's own free will.
  2. 5. connect skeletal muscles to bones
  3. 6. muscles are involuntary
Down
  1. 1. fibers are composed of specialized cells
  2. 2. done without will or conscious control
  3. 3. muscle is in the humans chest
  4. 6. muscles connect to the skeleton to help a person move