Chapter 11

2. a flap of tissue that closes automatically over your trachea
7. when you breathe in
8. tiny air sacs the bronchioles end
10. the two tubes that the trachea branches off into
12. a type of breathing that takes place when you thing about and control it
13. known as your voice box located at the top of your trachea
14. the human breathing system

1. tiny hair-like structures that line your nasal passage as well as most of the respiratory system
3. also known as the "windpipe"
4. when you breathe out
5. a strong, curved muscle attached below the lungs to the lower ribs and backbone
6. a type of breathing that your brain does automatically
9. the chords that stretch across the inside of your larynx
11. two saclike organs that replace the carbon dioxide in your blood with oxygen
15. the air that moves from your nose or mouth into your throat