Respiratory System

2. small organ that contains the vocal cords and connects the pharynx to the trachea.
3. small flap at the back of the mouth.
5. breathing you can control (e.g., hold your breath).
7. sticky substance in nasal passages that traps dust and germs.
10. two large tubes that branch from the trachea into each lung.
11. expand).
12. cords bands of elastic tissue in the larynx that produce voice.
14. bronchial tubes narrow and swell, causing coughing and wheezing; triggers
15. diaphragm moves upward, chest cavity gets smaller, air flows out of lungs (lungs
17. diaphragm moves downward, chest cavity expands, air flows into lungs (lungs fill
19. common respiratory illness affecting nose, throat, sinuses, ears, and bronchi.
20. and shrink).
22. allergies, exercise, and pollution.
24. can cause runny nose, sneezing, and breathing problems.
25. to take air into the body.
26. the part of the throat that connects the nose and mouth to the esophagus and

1. tiny blood vessels where gas exchange with alveoli happens.
4. infection that fills alveoli with fluid, making gas exchange hard.
6. tube that begins at the larynx and leads to the lungs (windpipe).
8. smaller tubes inside the lungs that branch from the bronchial tubes.
9. tiny air sacs where oxygen passes into the blood.
13. empty spaces in skull bones that help warm and moisturize air.
14. empty the lungs.
16. strong, curved muscle that separates chest from abdomen and moves to fill
17. breathing that happens without thinking.
18. to push air out of the body.
21. tiny hairlike structures in the respiratory system that move mucus toward the throat.
23. two saclike organs that exchange gases with the air.