Respiration

Edit Answers
123456789101112
Across
  1. 4. what the lungs contain
  2. 6. what the respiratory system is made of
  3. 7. a tube made up of rings of cartilage.
  4. 8. forms part of the digestive and respiratory systems.
  5. 9. expels carbon dioxide, which is a result of the activity of our cells.
  6. 12. To expel air from the lungs:
Down
  1. 1. two cavities inside the nose
  2. 2. up of the ribs, the sternum and the backbone.
  3. 3. two sponge-like organs located inside the ribcage.
  4. 5. contains the vocal cords, which produce sounds.
  5. 9. the two branches of the trachea. They divide into finer branches called bronchioles.
  6. 10. tiny air sacs at the end of the bronchioles
  7. 11. To take air into our lungs