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Circulatory System. Topic: 3202H Melinda Klockziem. 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
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Circulatory System Topic: 3202H Melinda Klockziem
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
Body Circulation Vena Cava Right Atrium Right Ventricle Pulmonary arteries Lungs Pulmonary veins Left atrium Left Ventricle Aorta Body Circulation
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
Electrocardiography • Evaluate the rhythm of the heart is with an electrocardiogram, known as an ECG or EKG
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.
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
