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Sport - Cardiovascul

Sport - Cardiovascular - functions

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