WebThe human heart is part of a double circulatory system. The circulatory system is a system of blood vessels with a pump (the heart) and valves that maintain a one-way flow of blood around the body. The heart has four chambers separated into two halves: The right side of the heart pumps blood to the lungs for gas exchange (this is the pulmonary ... WebNutrition and food tests (CCEA) Food provides energy and nutrients. The different components of our diet have different sources and functions. Part of. Biology (Single …
Food production - AQA test questions - AQA - BBC Bitesize
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GCSE Biology – Testing for sugars, starch and protein
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