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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).
RELATED QUESTIONS
Long answer question:
A man’s pulse rate is 68 and cardiac output is 5500 cm3 . Find the stroke volume.
In cardiac cycle for how Long atrial systole lasts?
Amount of blood pumped by the heart, during each heart beat is called ____________.
The longest phase of cardiac cycle is ____________.
What is the contraction phase of auricles called?
What is Cardiac output?
Cardiac output is ______.
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
During ventricular systole, the atrioventricular valves (P) ______ and semilunar valves (Q) ______.
