Exercise

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Across
  1. 3. exercise exercise that doesn’t require much oxygen
  2. 5. exercises exercise that makes us more flexible
  3. 7. a gas in the air that helps us live
  4. 8. a feeling that you are worried
Down
  1. 1. exercise exercise that requires a lot of oxygen
  2. 2. the condition of something
  3. 4. a disease that makes our bones weak
  4. 6. system how the body protects itself against diseases