1. 1.The breathing system allows oxygen to diffuse into the blood and carbon dioxide to diffuse out of the blood. 2.The breathing system includes ribs, diaphragm, lungs, trachea, bronchi, bronchioles and alveoli 3.Inhalation and exhalation involves the rib cage and the diaphragm The Lungs and Breathing

2. The Lungs

5. Breathing Breathing

6. Breathing

7. Breathing

8. 1.Gaseous exchange takes place in the alveoli 2.Oxygen enters the blood, Carbon Dioxide leaves the blood 3.Alveoli are adapted to allow maximum gaseous exchange to take place Alveoli Alveoli

9. Alveoli

10. Alveoli

11. Cilia and Mucus 1.Mucus membranes and cilia in the respiratory system protect the body from infection 2.Chemicals in tobacco smoke may cause heart or lung disease 3.Tobacco smoke inhibits the action of cilia Cilia and Mucus

14. Tobacco smoke Tobacco Smoke

15. Damage to cilia by tar

16. Carbon Monoxide poisoning

17. Smoking apparatus Breathing

18. Wordsearch Wordsearch

19. Quiz Quiz