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Sport - Cardiovascul
Sport - Cardiovascular - functions
Term | Definition |
---|---|
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 |