Muscular System crossword puzzle

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Across
  1. 5. Muscle composed of many bundle fibers
  2. 6. Muscle surrounded by a connective tissue sheath
  3. 7. Organ that deals with the Cardiac muscle
  4. 8. thick filament
  5. 9. Individual muscle fibers
Down
  1. 1. thin filament
  2. 2. individual muscle cells
  3. 3. connected to bones
  4. 4. Only type of muscle that is voluntary
  5. 10. cause the myosin head to detach from the actin