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Sport - Cardiovascular - functions

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Term
Definition
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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