Cardiovascular & Respiratory Systems Crossword

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Across
  1. 3. damages your lungs & heart, making it harder to do their jobs
  2. 7. system includes: heart, arteries, veins
  3. 9. -rich blood is sent to muscles to fuel exercise
  4. 10. the number of minutes you should exercise daily
Down
  1. 1. carry oxygen-rich blood away from the heart
  2. 2. system includes: lungs, airways to help you breathe
  3. 4. beats faster during exercise to keep up with our bodies increasing oxygen demand
  4. 5. how many lungs do we have
  5. 6. this body part is the beginning of our respiratory system
  6. 8. carry blood with carbon dioxide to the heart