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Circulatory System Topic: 3202H Melinda Klockziem
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Circulatory System Functions Respiratory – O2 and CO2 exchange Excretory – removes waste from body cells Protection – clotting, transports white blood cells to infections Nutrition – carries energy and food throughout the body Regulatory – helps to maintain pH and temperature Hormonal – transfers hormones to organs
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Body Circulation Vena Cava Right Atrium Right Ventricle Pulmonary arteries Lungs Pulmonary veins Left atrium Left Ventricle Aorta Body Circulation
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Heart Sounds Heart sounds are created by closure of the valves First heart sound –Lubb –Closure of atrioventricular valves Second heart sound –Dubb –Closure of aortic and pulmonary valves
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Electrocardiography Evaluate the rhythm of the heart is with an electrocardiogram, known as an ECG or EKG
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Electrocardiography ‘P’ wave –Reflects the flow of electricity through the atria, and tells us that the atria have received a normal impulse, and have contracted. The 'q, r, s' waves – tell us that the electrical circuit has traveled through the atrioventricular node, and through the ventricles, and has resulted in the ventricles contracting.
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Electrocardiography The 't' wave –is the most important one, in a way - it tells us that the electrical impulse has traveled all through the heart, and that the heart is now 'repolarizing', or getting ready for the next impulse to start
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Hill’s Science Diet
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