Sport - Cardiovascular - functions
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| What does the cardiovascular system deliver? | oxygen & nutrients to the tissues of the body
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| What does the cardiovascular system remove? | waste products (carbon dioxide & lactate)
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| Thermoregulation | maintaining body temperature (to ensure you don't overheat)
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| Vasocontriction | narrowing the blood vessels to reduce blood flow (to increase temperature)
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| Vasodilation | widening the blood vessels to increase blood flow (to decrease temperature)
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| Sinoatrial Node (SAN) | sends an impulse to the right atrium causing the muscular walls to contract. The contraction forces blood from the atrium down into the ventricles
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| Atrioventricular Node (AVN) | slows down the signal from the SAN. This allows the ventricles to fill with blood before contraction
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| Bundle of His | a specialist muscle cell that transports impulses from the AVN (found in the walls of the ventricles)
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| Purkinje Fibres | allow the ventricles to contract which pushes blood out of the heart
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Created by:
samfitter
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