Tobacco (chapter 10.1)

What’s in Tobacco? More than 4000 chemicals of which at least 43 are carcinogens (cause cancer)

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

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.

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

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

Circulatory System Effects Increased risk of heart disease

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