IV. Human Cardiovascular Physiology-Blood Pressure and Pulse Determinations Cardiac Cycle 1. Using the terms to the right of the diagram and the letter choices on the diagram, correctly identify each valve closing and opening, chamber pressures, volume lines, heart sounds, and each period of the cardiac cycle. 1. aortic pressure 2. atrial pressure (left) QRS 3. ЕCG 4. first heart sound 120 5. second heart sound 6. ventricular pressure (left) 80 7. ventricular volume 8. aortic (semilunar) valve closes 40 9. aortic (semilunar) valve opens 10. AV and semilunar valves are closed (2 letters) 11. AV valve closes 120 12. AV valve opens 13. ventricular diastole (2 letters) 14. ventricular systole 60 Ventricular volume (ml) Pressure (mm Hg) (Au)

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