Alveoli and Gas Exchange Investigations - GCSE Biology (9-1)
This video covers the following syllabus objectives from Edexcel IGCSE Biology 9-1
2.48 Explain how alveoli are adapted for gas exchange by diffusion between air in the lungs and blood in capillaries.
2.50 Practical: investigate breathing in humans, including the release of carbon dioxide and the effect of exercise.
For a PowerPoint on this topic visit www.mrexham.com