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Revision video for AQA AS Biology Unit 1 - Biology & Disease. In this video, we look at the Heart; it's structure and the importance of valves. We also look at the cardiac cycle; along with the role of the nodes.

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The Mammalian Heart: Structure | A-level Biology | OCR, AQA, Edexcel

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https://goo.gl/4wE16Y to unlock the full series of AS, A2 & A-level Biology videos created by A* students for the new OCR, AQA and Edexcel specification. This video will focus on: Structure of the Mammalian Heart

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The Heart is the organ that controls the circulatory system in mammals (and other animals). It pumps blood around the body. Mammals have a double circulatory system, so the heart must pump blood to the lung and to the rest of body simultaneously.