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🎓 IGCSE Biology - The Complete Course: https://www.tes.com/teaching-resource/resource-12989155 IGCSE Chemistry - The Complete Course: 🎓 Complete Teaching Resource (including past exam questions and mark schemes organised by chapter): https://www.tes.com/teaching-resource/resource-13280954 🎓 Student resource (PDF only): https://www.tes.com/teaching-resource/resource-13245244 🎓 All the videos (the complete library on Patreon): https://www.patreon.com/igbiocomplete ☕️ Buy me a coffee - https://www.buymeacoffee.com/ArthurJohnParker Cambridge IGCSE Biology (0610/0970) Chapter 9 - Transport in animals Topic 9.3 - Blood vessels For exams from 2025 (core and extended) As always this video follows the Cambridge syllabus exactly and contains absolutely everything you need to know for your final exam! My other channels: @igpecomplete - Cambridge IGCSE PE @ocrpecomplete - OCR GCSE PE Timestamps: 0:00 Contents 0:34 Arteries, veins & capillaries 1:26 Heart, lungs & kidneys 2:10 Blood vessels - structure and function (extended) 3:17 Liver (extended) Core content: - Describe the structure of arteries, veins and capillaries, limited to: relative thickness of wall, diameter of the lumen and the presence of valves in veins. - State the functions of capillaries. - Identify in diagrams and images the main blood vessels to and from the: (a) heart, limited to the vena cava, aorta, pulmonary artery and pulmonary vein. (b) lungs, limited to the pulmonary artery and pulmonary vein. (c) kidney, limited to the renal artery and renal vein. Extended content: - Explain how the structure of arteries and veins is related to the pressure of the blood that they transport. - Explain how the structure of capillaries is related to their functions. - Identify, in diagrams and images, the main blood vessels to and from the liver as: hepatic artery, hepatic veins and hepatic portal vein. Context: - In topic 9.1 we learned about the single circulation system of fish and the double circulation of mammals. - In topic 9.2 we examined the structures of the heart, including the coronary arteries, atria, ventricles, septum, atrioventricular and semilunar valves, and muscular walls (myocardium). - In topic 9.4 we'll learn about the four components of blood (plasma, platelets, white blood cells and red blood cells), the process of clotting and the functions of lymphocytes and phagocytes.
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