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Semilunar valves opened. Semilunar valves closed. AV valves closed. AV valves closed. Semilunar valves closed. Semilunar valves closed. AV valves closed. AV valves opened. Semilunar valves closed. AV valves opened. - PowerPoint PPT Presentation
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20.18 The Cardiac CycleSlide number 1
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
AV valves opened
Semilunarvalves closed
AV valves closed
Semilunarvalves closed
Semilunarvalves closed
4. Diastole: Passive ventricular filling. The AV valves open and blood flows into the relaxed ventricles, accounting for most of the ventricular filling.
3. Diastole: Period of isovolumic relaxation. Blood flowing back toward the relaxed ventricles causes the semilunar valves to close, which is the beginning of ventricular diastole. Note that the AV valves closed, also.
5. Diastole: Active ventricular filling. The atria contract and complete ventricular filling.
2. Systole: Period of ejection. Continued ventricular contraction pushes blood out of the ventricles, causing the semilunar valves to open.
1. Systole: Period of isovolumic contraction. Ventricular contraction causes the AV valves to close, which is the beginning of ventricular systole. The semilunar valves were closed in the previous diastole and remain closed during this period.
AV valves opened
AV valves closed
Semilunarvalves opened
AV valves closed
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Systole: Period of isovolumic contraction. Ventricular contraction causes the AV valves to close, which is the beginning of ventricular systole. The semilunar valves were closed in the previous diastole and remain closed during this period.
AV valves closed
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 3
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Systole: Period of ejection.
Systole: Period of isovolumic contraction.
AV valves closed
Semilunarvalves opened
AV valves closed
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 4
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Systole: Period of ejection. Continued ventricular contraction pushes blood out of the ventricles, causing the semilunar valves to open.
AV valves closed
Semilunarvalves opened
20.18 The Cardiac CycleSlide number 5
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Period of isovolumic relaxation.
Systole: Period of ejection.
AV valves closed
Semilunarvalves opened
AV valves closed
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 6
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Period of isovolumic relaxation. Blood flowing back toward the relaxed ventricles causes the semilunar valves to close, which is the beginning of ventricular diastole. Note that the AV valves closed, also.
AV valves closed
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 7
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Passive ventricular filling.
Diastole: Period of isovolumic relaxation.
AV valves closed
Semilunarvalves closed
AV valves opened
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 8
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Passive ventricular filling. The AV valves open and blood flows into the relaxed ventricles, accounting for most of the ventricular filling.
AV valves opened
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 9
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Passive ventricular filling.
Diastole: Active ventricular filling.
AV valves opened
Semilunarvalves closed
AV valves opened
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 10
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Active ventricular filling. The atria contract and complete ventricular filling.
AV valves opened
Semilunarvalves closed
20.18 The Cardiac CycleSlide number 11
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Diastole: Active ventricular filling.
Systole: Period of isovolumic contraction.
AV valves opened
Semilunarvalves closed
AV valves closed
Semilunarvalves closed
