| A | B |
|---|
| nicotine | addictive drug found in tobacco |
| tar | a thick, dark liquid that forms when tobacco burns |
| carbon monoxide | a colorless, odorless, poisonous gas produced when tobacco burns |
| respiratory system | set of organs that supply the body with O2 & rid the body of C02 |
| trachea | tube in throat that takes air to & from lungs |
| bronchi | two tubes that branch from the trachea, one to each lung |
| diaphragm | dome-shaped muscle that draws air in & pushes air out |
| alveoli | air sacs in the lungs where gases are exchanged |
| addiction | physical or psychological need for a drug |
| tolerance | when the body becomes used to a drug |
| withdrawal | unpleasant symptoms that occur when someone stops using a drug |
| mainstream smoke | smoke that the smoker exhales |
| passive smoker | nonsmokers who breathe secondhand smoke |
| secondhand smoke | air that has been contaminated by tobacco smoke |
| sidestream smoke | smoke coming from the burning tip of the cigarette |
| emphysema | lung disease which can be caused by smoking |
