Edexcel IGCSE Biology · Spec 2.49
Smoking and the Lungs
The harmful substances in tobacco smoke and their effects on the lungs, including emphysema and disease.
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Smoking and the Lungs
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Spec 2.49
What you need to know
- Name the harmful substances in tobacco smoke
- Describe their effects on the lungs
- Link smoking to disease
Active recall
Quick check
Answer each question before opening the answer.
Name two harmful substances in cigarette smoke and their effects.
Any two of: tar (carcinogen), nicotine (addictive, raises heart rate), carbon monoxide (reduces oxygen carried by the blood).
Name a disease linked to smoking.
Lung cancer, emphysema, chronic bronchitis or coronary heart disease.
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