1. Tobacco (chapter 10.1)

2. What’s in Tobacco?
More than chemicals of which at least 43 are carcinogens (cause cancer)

3. Some examples include:
Nicotine - addictive drug that raises the heartbeat and increases the craving for more tobacco.
Tar a thick, dark liquid that forms when tobacco burns.
Carbon Monoxide- A colorless, odorless, poisonous gas made by burning tobacco

4. Tobacco’s Effects on the Respiratory System
The alveoli (tiny air sacs in lungs ) may be damaged leading to a disease- emphysema.
Lung cancer is much more common in smokers than nonsmokers.

5. Digestive System Effects
Cancers of the mouth, throat, esophagus, stomach, and pancreas.
Cavities, gum disease, stomach ulcers

6. Excretory System Effects
Doubles the risk of getting bladder cancer.
Even smokeless tobacco increases bladder cancer risk.

7. Circulatory System Effects
Increased risk of heart disease

8. Nervous System Effects
Reduces flow of oxygen to the brain possibly leading to stroke because blood vessels are constricted (narrowed)