AQA OCR Edexcel AS Biology Answers The Heart Ci
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A Level Biology The Heart and Circulatory Answers Total Marks:/34 2022 AQA, OCR, Edexcel A Level Answer Marks 1. a) i) Movement of fluid in one direction ii) iii) – The heart causes high pressure in the arteries - The elastic tissue helps to regulate pressure -Smooth muscle helps to redistribute blood/ vasoconstriction, vasodilatation. iv) Forces blood to flow in one direction/ prevents back flow of blood. b) i) – Heart and lungs - Heart and rest of the body 1 mark 8 ma...