Edexcel OLevel Biology revision notes

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Lesson

Lesson-2.6.10- understand the biological consequences of smoking in relation to the lungs and the circulatory system, including coronary heart disease.

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Lesson-2.6.9- explain how alveoli are adapted for gas exchange by diffusion between air in the lungs and blood in capillaries.Previous Lesson-2.6.11- practical: investigate breathing in humans, including the release of carbon dioxide and the effect of exercise.Next