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Explain the function of the circulatory system

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Explain the function of the circulatory system

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As an introduction

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You need to label this diagram with the following labels; heart, arteries and veins

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This picture shows the flow of blood through the heart.

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This picture shows the flow of blood through the heart.

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You DO NOT need to put this picture in your assignment, but it may help you describe how blood flows throught the heart. It also shows which artery and vein are the exception to the rule (look for a vein carrying oxygenated blood shown in red and an artery carrying deoxygenated blood shown in blue).

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The main function of the heart is to pump blood around the body.
To achieve a Merit or distinction grade you also need to explain the flow of blood through the heart (e.g. oxygenated blood from the lungs enters the heart through the pulmonary vein into the left atrium, it then flows through a valve into the left ventricle. The job of the left ventricle is to squeeze and push blood into the aorta....). the explain which artery is the exception to the rule (and carries deoxygenated blood), which vein is the exception (and carries oxygenated blood), and explain why the heart has valves and explain why the left ventricle has thicker, more muscular walls.

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You need to label a diagram of the heart, you can use this one or one you chose.

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Diagram for Capillaries, Arteries and Veins

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Diagram for Capillaries, Arteries and Veins

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You need to label a picture, here is one you could use, or you can chose one yourself.

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Click on this table, it tells you everything you need to write about arteries, veins and capillaries for the assignment to achieve a Pass grade.
If you want a Merit of Distinction you need to explain why arteries have thick walls but a thin lumen, why Veins have thinner walls and valves and why capillaries are only one cell thick in more detail.