Transcript Tobacco PowerPoint

Tobacco
In this chapter, you will Learn About…
 How the substances in tobacco affect the
body.
 The illnesses that can damage the respiratory
system.
 Why people become addicted to tobacco and
why teens begin using tobacco.
 Benefits of avoiding tobacco use.
What Tobacco Does to the Body
In this lesson, you will Learn About…
 The substances in tobacco that cause health
problems.
 Why all forms of tobacco are harmful to
health.
 How tobacco affects various parts of the
body.
What Tobacco Does to the Body
The Vocabulary terms in this lesson are:
 Nicotine.
 Tar.
 Carbon monoxide.
 Alveoli.
 Emphysema.
The Facts About Tobacco
A single puff of tobacco smoke contains
more than 4,000 chemicals.
 Almost all of these chemicals prevent the body
from functioning the way it should.
 At least 43 of these chemicals cause cancer.
In the United States, more than 400,000
people die each year because of smokerelated illnesses.
What Is in Tobacco?
Tobacco contains three substances that are
especially harmful to health:
 Nicotine, a drug that makes tobacco users
crave even more nicotine
 Tar, a liquid that coats the lining of the lungs
and causes diseases
 Carbon monoxide, a colorless, odorless,
poisonous gas produced when tobacco burns
Harmful Substances in Tobacco
Smoke
Cyanide
is a deadly
poison.
Methanol,
a poisonous
liquid alcohol,
is known to
cause
blindness.
Formaldehyde is an
irritating, acidic gas used
in laboratory disinfectants
and preservatives.
Carbon monoxide
prevents the body from
getting all the oxygen it
needs.
Tar forms a
sticky coating
on the tubes
and air sacs
inside the
lungs.
Nicotine speeds the heartbeat,
raises blood pressure, increases the
craving for tobacco, and causes
dizziness and upset stomach.
Forms of Tobacco
Tobacco products can be smoked, chewed,
or inhaled.
 Products that are smoked:
 Cigarettes
 Cigars and pipes
 Smokeless products:
 Chewing tobacco
 Snuff
Cigarettes
Cigarettes are made from shredded
tobacco leaves.
Filters in cigarettes reduce the amount of
nicotine and tar in cigarette smoke.
Filters, however, do not decrease the
harmful chemicals passing through a
smoker’s lungs.
Cigars and Pipes
Shredded tobacco leaves are also used in
cigars and pipes.
Dangers of using cigars or pipes:
 Cigar smoke contains 25 times more carbon
monoxide and up to 400 times more nicotine
than cigarette smoke.
 Cigar and pipe smokers are more likely to
develop cancers of the lip, mouth, and tongue
than nonsmokers.
Smokeless Tobacco
Smokeless tobacco, such as chewing
tobacco and snuff, is placed in the mouth
or inhaled rather than smoked.
The nicotine in smokeless tobacco is just
as harmful and addictive as that in
cigarettes.
8 dips/day is like smoking 30 cigarettes
Smokeless Tobacco (cont’d.)
Users of smokeless tobacco:
 Face a higher risk of developing cancers of
mouth, esophagus, larynx, and pancreas than
tobacco users.
 Can also develop gum diseases and stomach
ulcers.
How Tobacco Harms the Body
Respiratory System
Tobacco smoke damages
the alveoli. This damage may
lead to emphysema.
Smokers are also between
12 and 22 times more likely
than nonsmokers
to develop lung
cancer.
Circulatory
System
Tobacco use is
linked to
Nervous System heart disease.
Tobacco use reduces
the flow of oxygen
to the brain, which
can lead to a
stroke.
Digestive System
All forms of tobacco
increase the risk
of cavities and gum
disease. Tobacco use
is linked to cancers
of the mouth, throat,
esophagus, stomach,
and pancreas.
Excretory System
Smokers have at least
twice the risk of
developing bladder
cancer as nonsmokers.
Smokeless tobacco
can also put users
at risk of developing
bladder cancer.
Regulating the Tobacco Industry
To control health hazards caused by
tobacco, the federal government has
passed the following regulations:
 Cigarette packs must feature warnings on the
health risks of smoking.
 Cigarette ads are banned from radio and
television.
 It is illegal to sell tobacco products to anyone
under age 18; in some states, the age is even
higher.
Reviewing Terms and Facts
Nicotine is an addictive drug found in
1. _______
tobacco.
Reviewing Terms and Facts
2. Name four substances in tobacco smoke
that are harmful to the body.






Nicotine
Methanol
Tar
Cyanide
Carbon monoxide
Formaldehyde
Thinking Critically
3. What might you say to persuade a
friend to quit chewing tobacco?
Vocabulary Review
Nicotine is an addictive drug found in
tobacco.
Vocabulary Review
Tar is a thick, dark liquid that forms when
tobacco burns.
Vocabulary Review
Carbon monoxide is a colorless, odorless,
poisonous gas produced when tobacco
burns.
Vocabulary Review
Alveoli are fragile, elastic, microscopic air
sacs in the lungs where carbon monoxide
from body cells and fresh oxygen from the
air are exchanged.
Vocabulary Review
Emphysema is a disease that destroys
alveoli.
Fold the sheet of notebook
paper in half along the
long axis.
On the top layer, cut every
third line. This will form
10 tabs.
Label the tabs as shown.
Define key terms and record facts about tobacco’s
effects on the body.
Assess your ability to separate the facts about
tobacco from the myths.
Take the Health Inventory for Chapter 10 at
http://www.glencoe.com/qe/qe65.php?qi=1686