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Question
Draw diagrammatic representation of cardiac cycle. Explain ventricular systole.
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Solution
Diagrammatic representation of Cardiac Cycle
Ventricular systole (VS):
- The impulse originating from SA node reaches the AV node and it gets excited. The AV node sends impulses to bundle of His and from bundle of His to Purkinje fibers. Purkinje fibers further spread impulses all over the wall of ventricles.
- Due to this, ventricular wall contracts causing ventricular systole. During ventricular systole, right ventricle pumps deoxygenated blood into pulmonary trunk and left ventricle pumps oxygenated blood into aorta.
- During ventricular systole the cuspid valves close both the atrioventricular apertures preventing blood flow into atria (lubb sound is heard).
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Complete the following sentence with appropriate word:
The sequence of one systole followed by one diastole is termed as the ___________.
Long answer question:
A man’s pulse rate is 68 and cardiac output is 5500 cm3 . Find the stroke volume.
Long answer question:
If the duration of the atrial systole is 0.1 sec and that of complete diastole is 0.4 sec, then how does one cardiac cycle complete in 0.8 sec?
The complete events of the cardiac cycle last for 0.8 sec. What is the timing for each event?
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During ventricular systole, the atrioventricular valves (P) ______ and semilunar valves (Q) ______.
