1. Smoking and Disease
Chapter 14.3

2. Objectives
Describe two circulatory system conditions that can be caused by smoking
Explain how smoking affects the lungs
Describe two respiratory system diseases that can be caused by smoking
Explain how smoking affects unborn babies and infants

3. Key Terms Nicotine Tar Atherosclerosis Heart attack Stroke
Hypertension
Lung cancer
Emphysema
Bronchitis
Asthma

4. Why is it Hard to Quit Smoking?
Nicotine is an addictive drug
It is absorbed through the lining of the mouth
It is absorbed through the Alveoli of the lungs
It enters the blood and is distributed throughout the body
Only 10 seconds after smoke is inhaled, nicotine reaches the brain
A brief “pleasurable” feeling is felt, then more smoke must be inhaled, as time goes by more smoke is needed
Stopping smoking leads to “withdrawal” symptoms

5. Health Effects of Smoking
Smoke contains
Poisons
Carbon Monoxide, Hydrogen Sulfide, and Cyanide
Cancer causing agents, (carcinogens)
Tar
Ash
Particles
Chemicals

6. Health Effects of Smoking
Smoking harms the body’s cleaning system
The lungs use mucus and cilia to remove small foreign objects from the lungs
Coughing removes larger objects from the lung
Smoking is linked to atherosclerosis
This can lead to heart attacks
This can also lead to stroke in the brain
This can also lead to high blood pressure
hypertension

7. Health Effects of Smoking
Lung Cancer, (fewer than 10% live 5 years)
About 90% of all cases of lung cancer are related to smoking
Breathing polluted air could also cause lung cancer, smoking increases this risk too
Lung cancer develops very slowly and may not be seen for years
It takes 10 years for the risks to be reduced, but only AFTER the person quits smoking

8. Health Effects of Smoking
Many other cancers that may be “triggered” by smoking
Bladder, pancreas, mouth, kidney, throat, larynx, esophagus
About 1/3 of all cancer in the USA is linked to smoking
There are other serious diseases linked to smoking
Emphysema
Bronchitis
Asthma

9. Secondhand Smoke
Those that do not smoke may be affected by the smoking of others
Slightly lower risks are seen for the same diseases as smokers
Pregnant Women, (increased infant death)
Smokers
Nicotine may cause miscarriage or premature birth
Secondhand smokers
No data to suggest it is any different than smoking

10. Summary Tobacco smoke contains nicotine and tar
Smoking increases a person’s risk for developing diseases of the circulatory and respiratory systems
Tobacco smoke reduces the ability of the lungs to clean themselves
People who breath secondhand smoke are at risk for the same diseases as smokers
Smoking affects the health of unborn babies

11. Definitions
Nicotine is a toxic, addictive substance found in tobacco, (is also used as a pesticide to kill insects)
Tar is a complex mixture of compounds, and ash particles contained in tobacco smoke
Atherosclerosis is a disease in which fatty deposits form in the walls of arteries
Heart attack is the death of a portion of the heart caused by reduced blood supply to the heart muscle
Stroke is a sudden loss of function in a part of the brain when it is deprived of its blood supply

12. Definitions
Hypertension is a condition in which the blood pressure is consistently higher than normal
Lung cancer is uncontrolled growth of cells that begins in the lungs
Emphysema is a disease in which the Alveoli in the lung collapse and break apart
Bronchitis is the inflammation of the bronchus
Asthma is when the bronchus become swollen

13. Collage