Respiratory System

4. microscopic air sacs in the lungs
6. where oxygen and carbon dioxide exchange
7. the part where air enters
10. is a windpipe that directs air to the lungs
12. is a dome-shaped muscle that separates the lungs from the abdomen
14. smaller bronchial tubes
15. is a flap of tissue that closes over the trachea when you swallow
16. is an inflammatory disease that causes the bronchi to become blocked or narrowed

1. a lung infection caused by viruses or bacteria
2. fine hairs that trap dirt that you breathe in
3. is swelling of the bronchi due to infection
5. is a bacterial lung infection that causes dry cough and chest pain
8. is a disease in which the alveoli are damaged or destroyed
9. is the upper part of the respiratory system which contains the vocal cords
11. are immune responses to foreign substances in the environment
13. caused by virus and symptoms include coughing, runny nose, aches and fever