A single cardiac cycle lasts about:
Correct answer: B. 0.8 sec
- A. 0.008 sec
- B. 0.8 sec
- C. 8 sec
- D. 0.088 sec
Explanation
The cardiac cycle involves the complete contraction and relaxation of both the atria and ventricles and the cycle lasts for about 0.8 seconds. •Atrial systole, where atria contract and eject blood into ventricles lasts for about 0.1 seconds. •Ventricular systole, where ventricles contract and eject blood lasts for about 0.3 seconds.
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About Circulation
The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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