Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able...

Smoking Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking

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Transcript of Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able...

Smoking Smoking 1. All must be able to recall respiration

describe lung structure2. Most should be able explain gas

exchange3. Describe the effects of smoking

What is in a cigarette? What is in a cigarette?

Page 3: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Page 4: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Carbon monoxide: combines with haemoglobin in red blood cells – reducing their capacity to carry oxygen

Hydrogen cyanide: a toxic colorless gas which is poisonous. Also dangerous for passive smokers.

Tar: causes cancer of the lungs, mouth and throat. It coats the surface of the breathing tubes and the alveoli. This causes coughing and damages the alveoli, making it more difficult for gas exchange to happen.

Nicotine: Highly addictive drug. Also increases your heart rate and blood pressure.

Page 5: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Page 6: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

The effects of smoking:

Cancer

Bronchitis

Emphysema

Smokers cough

Page 7: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Cancer - Tobacco smoke contains at least 80 different cancer causing substances. When you inhale smoke, these chemicals enter your lungs and spread around the rest of your body.

Scientists have shown that these chemicals can damage DNA and change important genes. This causes cancer by making your cells grow and multiply out of control.

Page 8: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Emphysema - destruction of the alveoli for gas exchange which causes extreme shortage of breath

Page 9: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Bronchitis - The passages to the lungs are swollen and sore because the smoke irritates them.

Page 10: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Smoke - Cells in the lining of the breathing tubes produce sticky mucus to trap dirt and microbes. Cells with tiny hair-like parts, called cilia, normally move the mucus out of the lungs.

Hot smoke and tar from smoking damages the cilia. So smokers cough to move the mucus and are more likely to get bronchitis.

Page 11: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Page 12: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Smoking Suzie

Page 13: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Complete smoking and health sheet

Page 14: Smoking 1. All must be able to recall respiration describe lung structure 2. Most should be able explain gas exchange 3. Describe the effects of smoking.

Facts and figures:Facts and figures:•Smokers are three times more likely to get heart disease.•9 out of 10 people with lung cancer are smokers.•25% of people who take up smoking, die from it.•Most smokers live 10–15 years less than non-smokers.•100 000 people per year die from diseases caused by smoking, like cancer, heart disease, emphysema and bronchitis.