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Describe the structure and function of the cardiovascular system and how it is affected by exercise?

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The Cardiovascular System and Exercise

1) Delivers oxygen to working muscles
2) Oxygenates blood by returning it to the lungs
3) Transports heat (a by-product of activity) from the core to the skin
4) Delivers nutrients and fuel to active tissues
5) Transports hormones
Exercise places an increased demand on the cardiovascular system. Oxygen demand by the muscles increases sharply. Metabolic processes speed up and more waste is created. More nutrients are used and body temperature rises. To perform as efficiently as possible the cardiovascular system must regulate these changes and meet the body's increasing demands
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