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प्रश्न
Draw diagrammatic representation of cardiac cycle. Explain ventricular systole.
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उत्तर
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).
संबंधित प्रश्न
Complete the following sentence with appropriate word:
The sequence of one systole followed by one diastole is termed as the ___________.
The wall of the human heart is made of ______
The complete events of the cardiac cycle last for 0.8 sec. What is the timing for each event?
With which of the following event the cardiac cycle starts?
The ventricular diastole has 0 duration of seconds.
Name the two valves that open during this phase.
In which one of the following pair, the two items mean one and the same thing?
Give reason:
The wall of left ventricle is thicker than right ventricle
What are the time durations for each of the following events in cardiac cycle?
- Atrial systole
- Atrial diastole
- Ventricular systole
- Ventricular diastole
During ventricular systole, the atrioventricular valves (P) ______ and semilunar valves (Q) ______.
