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Notes / OxfordAQA International A-level Biology

Unit 1

Gas Exchange and the Transport of Oxygen in Living Organisms

4 pages.

1Surface Area to Volume Ratio
2Gas Exchange in Single-celled Organisms, Insects and Plants
3The Human Gas Exchange System
4Blood Circulation and Haemoglobin

All of OxfordAQA International A-level Biology

Excel with Osman

Revision notes for GCSE, IGCSE and A-level, written from the mark schemes rather than the textbook.

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All notes are original work. Not affiliated with, endorsed by, or connected to AQA, OxfordAQA, Pearson Edexcel or Cambridge International Education. Specification codes are used to identify the course a set of notes covers.