smoking and your health chapter 18, section 2 tuesday, april 13, 2010 pages 576 -- 580

Smoking and Your HealthChapter 18, Section 2

Tuesday, April 13, 2010

Pages 576 -- 580

Objectives

• Recognize the harmful chemicals that are contained in tobacco smoke.

• Understand how tobacco smoke harm the respiratory and circulatory systems.

Vocabulary Words

• Tar• Carbon monoxide• Nicotine• Addiction• Chronic bronchitis• Emphysema• Lung cancer• Passive smoking

Tobacco Smoke

• Tobacco smoke contain some of the most deadly substance.– Tar: dark, sticky substance that’s produced by the

burning of tobacco. • Tar settles on the cilia that line the respiratory organs. • Tar makes the cilia clump together so they cannot

prevent harmful materials from getting into the lungs. • Tar contains chemicals that are known to cause cander.

Tobacco Smoke -- cont’d

• Another deadly substance in tobacco smoke is carbon monoxide.– Carbon monoxide is produced with tobacco is

burned.– It is dangerous to inhale. Carbon monoxide

molecules bind to hemoglobin in the red blood cells.

– This takes place of some of the oxygen that red blood cells normally carry.

– Less oxygen means a faster heartbeat and breathing rate.

Tobacco Smoke -- cont’d

• Nicotine is another deadly substance.– Nicotine speeds up the nervous system,

heart, and other organs.– Nicotine produces an addiction (physical

dependence)

Results from Long-Term Smoking

• Over time, smokers can develop serious respiratory problems.– Bronchitis is an irritation of the breathing

passages. • Passages become narrow. • Passages may be clogged with mucus.• Long term bronchitis is called chronic

bronchitis.• Chronic bronchitis causes damage to the

breathing passages.

Results from Long-Term Smoking -- cont’d

• Emphysema is another serious respiratory problem.– Emphysema is a disease that destroys

lung tissue and causes difficulty in breathing.

– Emphysema sufferers do not get enough oxygen and cannot adequately eliminate carbon dioxide.

Results from Long-Term Smoking -- cont’d

• Lung cancer is another serious affect of long-term smoking.

• It is known that cigarette smoke contains over 40 chemicals that cause cancer.

• Cancer tumors take away space in the lungs that should be used for gas exchange.

• Lung cancer is difficult to detect early enough for effective treatment.

Risks of Tobacco Usage

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Affect of Smoking on Circulatory System

• Some chemicals in tobacco smoke get into the blood and cause problems in the circulatory system.

• Smokers are more than twice as likely to have heart attacks than non-smokers.

• Chemicals in tobacco harden and narrows the arteries.

Passive Smoking

• Passive smoking is when people who do not smoke involuntarily inhale the smoke from other people’s cigarettes, cigars, or pipes.

• This is almost worse than actually smoking because now the passive smoker is inhaling the chemicals from the smoke as well as carbon monoxide that is exhaled from the smoker.

Review

• What are the 3 harmful substances found in tobacco?

• What are the effects of each of these substances?

• Name the 3 respiratory problems caused by smoking.

• How does smoking affect the circulatory system?

• Name some factors that may pressure a teenager to begin smoking.

Homework

• Workbook 18.2 (4/15)

• Vocabulary quiz 18.2 (4/15)

• Breath of Fresh Air lab report (4/16)