End-Systolic Volume is Defined as The

Question

End-systolic volume is defined as the
A) amount of blood a ventricle ejects per cycle.
B) amount of blood which backflows into a ventricle.
C) amount of blood remaining in an atrium after atrial systole.
D) amount of blood remaining in a ventricle after contraction.
E) stroke volume multiplied by the heart rate.

Accepted Answer

End-systolic volume is the amount of blood remaining in a ventricle after contraction, which is why it is also known as residual volume. It is the volume of blood that cannot be pumped out of the heart and is left behind in the ventricle.