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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
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.
The wall of the human heart is made of ______
In cardiac cycle for how Long atrial systole lasts?
With which of the following event the cardiac cycle starts?
Amount of blood pumped by the heart, during each heart beat is called ____________.
What is the contraction phase of auricles called?
What is Cardiac output?
In which one of the following pair, the two items mean one and the same thing?
During ventricular systole, the atrioventricular valves (P) ______ and semilunar valves (Q) ______.
