IGCSE Biology / Breathing and gas exchange
The effects of smoking on the lungs and the circulation revision notes
Edexcel International GCSE Biology (4BI1), chapter 3: Breathing and gas exchange, specification point 2.49. Part of the full course.
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Cigarette smoke contains substances that damage the lungs and the circulation in different ways. Linking each substance to the structure it affects and the disease or effect that follows helps you explain the harm caused by smoking.