Body Systems

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Across
  1. 1. A sheet of muscle that helps us breathe
  2. 4. The smallest individual part of an organism
  3. 7. Main breathing organ
  4. 8. A pair of muscles that work together
  5. 11. Joint in the hip, ball and _____
  6. 12. Made up of a group of the same cells
  7. 13. Joins muscles to bones
  8. 14. Breathing out
Down
  1. 2. Tiny air sacs where gas exchange takes place
  2. 3. The largest bone in the body
  3. 5. Joins bones together
  4. 6. There is more of this gas when we breathe in than out
  5. 9. Also called the windpipe
  6. 10. The main part of air