3. The human circulatory system

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Dr Alex Lathbridge guides you through the most important GCSE Biology facts, with a few jokes thrown in too. In this third episode of our series all about organisation of animals and plants, Dr Alex Lathbridge breaks down the key facts about the circulatory system, looking at the structure of the heart and the main blood vessels that move blood in and out of it. Plus, Dr Alex guides you through the differences between pulmonary and systemic circulation, and three types of blood vessels - arteries, capillaries, and veins. Take a look on the BBC Bitesize website to find out more about this topic, with revision notes, quizzes and exam-style questions: https://www.bbc.co.uk/bitesize/guides/zsncsrd/revision/2 Combined science AQA Synergy AQA Trilogy Edexcel Eduqas OCR 21st Century OCR Gateway Single science AQA Edexcel Eduqas OCR 21st Century OCR Gateway