1. Chapter 8 Tobacco Lesson 1 How Tobacco Affects the Body Next >>
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2. An addictive, or habit-forming, drug found in tobacco
nicotine
An addictive, or habit-forming, 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
Click to reveal the definitions.

3. The tiny air sacs in the lungs
alveoli
The tiny air sacs in the lungs
A disease that results in the destruction of the alveoli in the lungs
emphysema
Click to reveal the definitions.

4. In this lesson, you will be able to
identify the harmful ingredients in tobacco smoke.
describe how tobacco affects the body.
apply the skill of advocacy to encourage someone to be tobacco free.

5. Headings in this Lesson
Predicting
Look over the headings in this lesson. Write a question that you think the lesson will answer. After the lesson, check to see if your question was answered.
Headings in this Lesson
Facts About Tobacco
What Is in Tobacco?
Forms of Tobacco
Tobacco Affects Body Systems

6. = Facts About Tobacco 4,000 Harmful Chemicals! One puff of
tobacco smoke
4,000 Harmful Chemicals! =
Several of the chemicals in tobacco smoke can cause cancer and most of the 4,000 chemicals in tobacco smoke hurt your body’s ability to work properly.
In the United States, more than 400,000 people die every year from smoking-related illnesses.

7. What Is In Tobacco?
Tobacco products contain poisonous substances such as nicotine, tar, and carbon monoxide.
nicotine An addictive, or habit-forming, drug found in tobacco
Tobacco naturally contains harmful substances, but tobacco companies add more harmful ingredients when they prepare tobacco to be sold.
Once you are addicted to nicotine, your body has a strong need, or craving, for it. As a result, you want to smoke again and again.
Tar coats the airways and the linings of the lungs. Lungs coated with tar can become diseased.
When carbon monoxide enters the body, it damages the brain and the heart by reducing the amount of oxygen available to these organs.
tar A thick, dark liquid that forms when tobacco burns
carbon monoxide A colorless, odorless, poisonous gas produced when tobacco burns

8. What Is In Tobacco? Cyanide Formaldehyde Methyl Ethyl Ketone
Polonium 210
A deadly poison found in pest control products.
A burning, stinging gas used as a preservative in laboratories. Causes nasal cancer.
Used in solvents. Harms the central nervous system.
An element known to cause cancer.
These are only a few of the thousands of harmful ingredients contained in cigarettes and other forms of tobacco.

9. Forms of Tobacco Cigarettes Cigars and Pipes Smokeless Tobacco
Filters do not keep out harmful chemicals.
Flavored cigarettes have more chemicals than non-flavored cigarettes.
Cigar smoke is more harmful than cigarette smoke.
Smokers of cigars and pipes are more likely to get mouth, tongue, or lip cancer than people who don’t smoke.
The two forms are chewing tobacco and snuff.
Nicotine is absorbed into the body through the digestive tract.
Smokeless tobacco is just as harmful and addictive as cigarettes.
Tobacco companies harvest leaves from tobacco plants. They dry the leaves and prepare them for people to smoke or chew.

10. Tobacco Affects Body Systems
Some of the effects of using tobacco include:
Bad breath
Bad odor in hair and clothes
Increased heart rate
Increased blood pressure
Getting sick more often and longer
Decreased ability to run as far or as fast

12. Respiratory System
Breathing in tobacco smoke damages the alveoli, which can lead to emphysema.
alveoli The tiny air sacs in the lungs
When the alveoli are damaged, your lungs are less able to supply oxygen to your body.
A disease that affects a large part of the lungs can lead to death.
emphysema A disease that results in the destruction of the alveoli in the lungs

13. Digestive System
Smoking can lead to mouth and stomach ulcers, which are painful, open sores.
Smoking increases the chances that you will get cavities and gum disease.
Smoking causes yellowing of the teeth.

14. This causes tobacco users to need more tobacco.
Nervous System
The brain adapts to nicotine by increasing the number of nicotine receptors.
This causes tobacco users to need more tobacco.
Your brain needs a healthy supply of oxygen. Tobacco smoke contains carbon monoxide, which cuts down the amount of oxygen that the blood can carry to the brain.

15. As a person smokes, blood vessels constrict.
Circulatory System
As a person smokes, blood vessels constrict.
Over time, the blood vessels can harden, which can lead to heart attack, stroke, or coronary heart disease.
Coronary heart disease is when the blood vessels turn hard or become clogged.

16. Bladder damage and increased risk of colorectal cancer
Excretory System
Lungs
Blood
Kidneys
And Urine
SMOKE CHEMICALS
Smoke chemicals in tobacco smoke are absorbed from the lungs and get into the blood. From the blood, the chemicals get into the kidneys and urine. These chemicals damage the cells that line the inside of the bladder and increase the risk of cancer.
Bladder damage and increased risk of colorectal cancer

17. What I Learned Vocabulary Define tar. Lesson 1 Review
Tar is a thick, dark liquid that forms when tobacco burns.

18. Lesson 1 Review
What I Learned
Explain Describe the ways in which smoking harms the body.
Answers may include that smoking damages the alveoli, leads to mouth and stomach ulcers, reduces oxygen flow to the brain, constricts blood vessels, and damages the cells inside of the bladder.

19. Lesson 1 Review
What I Learned
Identify Name five substances in tobacco smoke that are harmful to the body.
nicotine, tar, carbon monoxide, cyanide, and methanol

20. What I Learned List Name three forms of tobacco. Lesson 1 Review
cigarettes, cigars, smokeless tobacco

21. Lesson 1 Review
Thinking Critically
Hypothesize How might you influence a peer to make the healthful choice to quit chewing tobacco?
Answers, which will vary, should include information on the health risks of chewing tobacco.

22. Lesson 1 Review
Thinking Critically
Analyze Why do you think it is important for a teen to never try tobacco?
Sample answer: Nicotine is addictive, and using tobacco can cause cancer.

23. Chapter 8 Tobacco End of Lesson 1 How Tobacco Affects the Body
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