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