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Chapter 10
Tobacco/Addiction/Respiratory System
Do Now
• List 3 reasons you should refuse an offer of a cigarette.
Harmful Effects on the Body
• 4000 chemicals (single puff)• 43 cause cancer
• 400,000 people die each year
Harmful Substances in Tobacco1. Nicotine2. Methanol
3. Tar4. Cyanide
5. Carbon monoxide6. Formaldehyde
Important Definitions
1. Nicotine – an addictive drug found in tobacco
2. Tar - a thick, dark liquid that forms when tobacco burns
3. Carbon monoxide – a colorless, odorless, poisonous gas produced when tobacco burns
4. Methanol - a poisonous liquid alcohol, known to cause blindness
5. Cyanide – a deadly poison6. Formaldehyde – acidic gas used in a lab,
disinfects and preserves
Forms of Tobacco
1. Cigarettes2. Cigars/pipes
3. Smokeless tobacco
Do now
• Although you breathe all the time, you probably don’t think about it very often. Describe the activities or conditions that make you aware of your breathing.
Respiratory System
A set of organs that supply your body with oxygen and rid your
body of carbon dioxide.
Parts of the Respiratory System
1. Nose/mouth – cilia trap dirt in nose2. Epiglottis – flap that covers trachea to
prevent food inside3. Trachea (windpipe) – air from throat to lungs4. Lungs – exchange oxygen and carbon dioxide5. Bronchi – tube that branches from trachea to
lungs6. Diaphragm – muscle below lungs that
expands/relaxes = breath
Breathing Process
1. Diaphragm expands > air enters the body through nose/mouth > epiglottis > trachea > bronchi
2. Bronchi divide > bronchioles > alveoli surrounded by capillaries > oxygen and carbon dioxide exchange = blood
3. Diaphragm relaxes > air leaves the body that contains carbon dioxide from the lungs
Illnesses of the Respiratory SystemCold/Flu
Caused by Virus
SymptomsRunny nose, cough, fever
Illnesses of the Respiratory System
Pneumonia
Caused by Virus/Bacteria
SymptomsFever, chest pain
Illnesses of the Respiratory SystemAsthma
Airways narrow
SymptomsWheezing, shortness of breath
Illnesses of the Respiratory System
Tuberculosis
Caused by Bacteria
SymptomsCough, fatigue, fatal
Illnesses of the Respiratory System
Emphysema
Caused by smoking, Alveoli harden
SymptomsDifficulty breathing
NO CURE!!
Illnesses of the Respiratory System
Lung Cancer
Caused by uncontrolled growth of cells that produce abnormally
(surgery, radiation, medications)
Ways to Keep the RS Healthy
1. Don’t smoke2. Avoid people/situations that
expose you to smoke3. Take care of your body = cold,
flu
Do now
• List some ways you might help someone who wants to quit using tobacco.
Dependencies
Psychological DependenceAn addiction in which a
personbelieves that he/she
needs a drug inorder to feel good or
functionnormally
Physical DependenceAn addiction in which the
bodydevelops a chemical need
for a drug.
Addiction
A physiological or physical need for a drug or other substance
Do now
• Briefly explain why you think staying tobacco free is good for your health.
Reasons for Teenage Use
1. Peer pressure2. Family members3. Seem grown up4. Look cool5. Look like a celebrity6. Hooked and can’t quit
Important Definitions
1. Secondhand smoke – air that has been contaminated by smoke
2. Mainstream smoke – smoke that a smoker inhales/exhales
3. Sidestream smoke – smoke that comes from the burning end of the cigarette
4. Passive smokers – non-smokers who breath secondhand smoke
Benefits of Saying NO to Tobacco
1. Healthy skin2. Fresh breath3. Honest toward parents/friends4. Better smelling clothes/hair5. Save money6. Better health7. More energy and endurance8. Fewer allergies
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