Write function of heart ...
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It's the muscle at the centre of your circulation system, pumping blood around your body as your heart beats. This blood sends oxygen and nutrients to all parts of your body, and carries away unwanted carbon dioxide and waste products
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Often described as a “pump,” the heart is responsible for receiving deoxygenated blood, recycling it through the lungs, and supplying oxygenated blood to the body. The heart contains four inner chambers: two atria (upper chambers) and two ventricles (lower ventricles).
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