Answer:
(a) Cardiac Cycle consists
of one heart beat or one cycle of contraction and relaxation of the cardiac
muscle. The contraction phase is called the systole while the relaxation phase
is called the diastole.
The purpose of
cardiac cycle is to effectively pump the blood. The right ventricle pumps the
volume of deoxygenated blood to the lungs through pulmonary artery. After the
oxygenation of blood the volume of blood carried through pulmonary vein is pumped
through left ventricle into the aorta and transferred to the entire body This
pumping of blood, is about the same and any mismatch in volumes ejected by the
ventricles (i.e., right ventricle pump more blood than left or vice versa) can
result in the heart failure. Thus, all the other option are wrong.
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