Bryan Station Middle School

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Tobacco Vocabulary

Chapter 10

 Nicotine An 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

 Alveoli -- Fragile, elastic, microscopic air sacs in the lungs where carbon dioxide from body cells and fresh oxygen from the air are exchanged

 Emphysema -- A disease that destroys alveoli

Respiratory System --The set of organs that supply your body with oxygen and rid your body of carbon dioxide

 Trachea -- Tube in throat that takes air to and from lungs (windpipe)

 Bronchi -- Two tubes that branch from the trachea; one tube leads to each lung

 Diaphragm -- Large dome-shaped muscle below the lungs that expands and relaxes to produce breathing

 Addiction --A psychological or physical need for a drug or other substance

 Withdrawal --The unpleasant symptoms that someone experiences when he or she stops using an addictive substance

 Psychological Dependence --An addiction in which a person believes that he or she needs a drug in order to feel good or function normally

 Physical Dependence --An addiction in which the body develops a chemical need for a drug

 Tolerance--The body's need for larger and larger doses of a drug to produce the same effect

 Secondhand Smoke--Air that has been contaminated by tobacco smoke

 Mainstream Smoke--The smoke that a smoker inhales and then exhales

 Sidestream Smoke--Smoke that comes from the burning end of a cigarette, pipe, or cigar

 Passive Smokers--Nonsmokers who breathe secondhand smoke