Respiratory System

1. , a life supporting gas
5. , a hollow tube that lets air pass from your throat to your lungs
6. , the major muscle in the respiratory system that contracts
10. , to breathe air in
11. , tubes of airways that let air in and out of your lungs
12. , a pair of organs in your chest that supplies oxygen
13. , to inhale/exhale air in and out of the lungs
16. , a breathing problem where airways in the lungs get swollen, smaller and filled with mucus
17. Dioxide - a colorless gas which is a waste your body produces

2. , a small movable 'lid' just above the larynx that prevents food and drink from entering
3. , tiny tubes that transport air
4. , a hollow tube in the neck that starts behind the nose
7. , tiny air sacs at the end of the bronchiles which transport gas
8. , a small slender hair-like structure present on cells
9. Capacity , the volume of air in your lungs
14. , to breathe air out
15. , the airway that leads to the larynx to the bronchi