Advertisements
Advertisements
Question
Draw diagrammatic representation of cardiac cycle. Explain ventricular systole.
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.
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 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?
Name the two valves that open during this phase.
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
