Crossword

12345678910111213
Across
  1. 2. Also called wind pipe
  2. 5. tubes that carry blood from parts of your body to the heart
  3. 7. arteries and veins are by networks of very narrow tubes calles__
  4. 9. The main organ in our circulatory system
  5. 11. Which gas makes up most of the air you breath in
  6. 12. A group of similar__ come together to make a tissue
  7. 13. breath using this part of your body
Down
  1. 1. Different organs working together
  2. 3. To stay alive your cells need__
  3. 4. If body fights diseases
  4. 6. Balloon like air sacs at the end of the bronchiole
  5. 7. Germs that spread easily
  6. 8. Different word for breathing
  7. 10. Transports blood away from the body