Breathing

4. The action of breathing out
6. The action of breathing in
7. A sheet of muscle that contracts and flattens downwards during inhalation
8. The tubes that carry air from the windpipe specifically into the lungs
9. This liquid remains clear with inhaled air but turns cloudy with exhaled air
10. This part of the skeleton moves upwards and outwards when we inhale
11. A serious condition caused by uncontrolled cell division in the lungs
12. A respiratory disease caused by smoking that involves inflammation of the lungs
13. This organ carries air from the nose to the bronchi and produces mucus to trap dust

1. This paper is used to test for water vapour, turning from blue to pink
2. This occurs when a foreign object enters the windpipe, potentially leading to death
3. The chemical process in cells where oxygen reacts with food to release energy
5. Occurs when you breathe in tobacco smoke from smokers around you
8. The physical process of air entering and leaving the lungs
11. The organ that expands to take in air and is the site where oxygen enters the blood