a dark sticky substance that forms when tobacco burns

a colorless, odorless gas produced when substances including tobacco are burned

a stimulant drug in tobacco that increases the activities of the nervous system, heart and other organs

a physical dependence on a substance

an irritation of the breathing passages in which small passages become narrower than normal and may be clogged with mucus

a serious disease that destroys lung tissue and causes breathing difficulties

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LCE Science

Ch 4 : Respiration & Excretion Sec 2 : Smoking and Your Health

Term	Definition
tar	a dark sticky substance that forms when tobacco burns
carbon monoxide	a colorless, odorless gas produced when substances including tobacco are burned
nicotine	a stimulant drug in tobacco that increases the activities of the nervous system, heart and other organs
addiction	a physical dependence on a substance
bronchitis	an irritation of the breathing passages in which small passages become narrower than normal and may be clogged with mucus
emphysema	a serious disease that destroys lung tissue and causes breathing difficulties