muscular system

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Across
  1. 1. do humans need muscles to survive
  2. 4. most important action in the neck
  3. 5. hardest working muscle
  4. 6. what is the muscular system composed of
  5. 12. main part of muscular system involving tissue
  6. 13. connect muscles to bone
  7. 14. are the busiest muscles
  8. 16. contraction makes the most heat in the body
  9. 19. main part of muscular system involving the heart
  10. 20. biggest muscle in the body
Down
  1. 2. main part of muscular system
  2. 3. pro-dominant function
  3. 7. how many muscles are required to smile
  4. 8. widest muscle in the body
  5. 9. aerobic exercise makes you
  6. 10. strongest muscle in the body
  7. 11. makes up the skeleton
  8. 15. muscles of the body wall the internal organs
  9. 17. a structure where two points on a human or animal skeleton are fitted together.
  10. 18. how many muscles are in the body
  11. 21. contains the smallest muscle in the body