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Heart Rate Lab

Heart Rate Lab. Heart Beat Measuring heart rate under d ifferent conditions. Do Investigating claims on your own. . Circulatory System. The Circulatory System. Takes 60 seconds for a blood cell to make a complete circuit of the body. 5.6 liters of blood being pumped at a time .

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Heart Rate Lab

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  1. Heart Rate Lab • Heart Beat • Measuring heart rate under • different conditions. • Do Investigating claims on • your own.

  2. Circulatory System

  3. The Circulatory System • Takes 60 seconds for a blood cell to make • a complete circuit of the body • 5.6 liters of blood being pumped at a time • Your heart will beat 100,000 times today = 2 liters • 35 million beats a year • Aorta- diameter of garden house, capillaries • as thin as a hair = 1 liter

  4. Functions of circulatory System • Transportation • Oxygen • Nutrients • Removal • Wastes from tissues • The “Blood Mobile”

  5. What’s in your Blood? • Plasma • Liquid part of the blood • 90% water • White Blood Cells • Fight infection • Engulf bacteria cells • Red Blood Cells • Most common blood cells • Hemoglobin transported • Carries oxygen • Platelets • Cell fragments • Helps clot blood

  6. Blood Vessels • Artery “away” • Blood pushed away from heart • Blood vessel where a pulse can be felt • Delivers oxygen-rich blood to capillaries • High pressure • Capillaries • Smallest blood vessel • Exchange materials, from blood to tissues and tissues to blood  O2, CO2, waster, nutrients • Veins • Contains valves • Brings wastes to the heart and lungs • Low pressure • Varicose Veins  valves no longer work

  7. The Human Heart All Muscle

  8. You’ve gotta have heart • Heart failure is the leading cause of death in men and women • ~ 800,000 Americans a year of a heart attack • ~ 500,000 Americans who have already had a heart attack have another one every year • Heart disease costs in America ~ $108.9 billion

  9. You’ve gotta have heart • Risk Factors • Inactivity-53% • Obesity- 34% • High Blood Pressure- 32% • Cigarette Smoking- 21% • High Cholesterol- 15% • Diabetes- 11%

  10. External View Pericardium superior vena cava pulmonary artery aorta pulmonary vein pulmonary vein coronary artery right atrium left ventricle inferior vena cava right ventricle

  11. Internal View Superior Vena Cava Inferior Vena Cava

  12. Internal Veiw Right Atrium

  13. Internal View Right Ventricle

  14. Internal View Pulmonary Arteries

  15. Internal View Left Pulmonary Veins

  16. Internal View Left Atrium

  17. Internal View Left ventricle

  18. Internal View Aortic arch Aorta

  19. Internal View Semilunar Valves Bicuspid Valve Tricuspid Valve Septum

  20. Nodes • Natural pacemakers • Sinoatrial Node (SV node or SA node) • Cardiac muscle mass on top of right atrium • Primary generator regular electrical impulses of the heart • Controls pulse, sends it to AV node • Atrioventricular Node (AV node) • Secondary response, controls contraction • Delays signal, prevents simultaneous contraction • Artificial Pacemakers • Atrial Fibrillation • Electrical signals and impulses occurring in places other than the nodes • Prevents the right atrium from filling up with blood, body is deprived of blood.

  21. Types of Circulation • Two types • Systemic (greater) Circulation • Pulmonary (lesser) Circulation • Systemic • Part of circulation that carries oxygenated blood away from heart to the rest of the body. • Which side of the heart pushes the blood out? • Which vessel carries oxygenated blood away?

  22. Types of Circulation • Pulmonary circulation • Blood flow between heart and lungs. • Primary job is to exchange O2 and CO2 • In this way, it keeps systemic circulation on track

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