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THE CIRCULATORY SYSTEM Temple College ECA The Circulatory System •Function •Components The Heart Circulation of the Heart Electrical Conduction System SA node AV node Bundle of his Bundle branches Purkinje network Normal Heart Rates Adult 60-80 beats/min Children 80-100 beats/min Infants 100-120 beats/min Blood Vessels Arteries Vein Arterioles Veins Artery Valve Venules Capillaries Arterioles Venules Capillarybed Major Arteries and Veins Aorta Superior vena cava Pulmonary Inferior vena cava Carotid Pulmonary Femoral Jugular Brachial Radial Physiology of the Circulatory System Pulse – Forceful pumping of blood out of the heart Blood pressure – Amount of force exerted against walls of arteries Systole: Muscles contracts Diastole: Muscles relax
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