ANATOMY
LIMB VASCULATURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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true
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false
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Either A or B
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None of the above
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Detailed explanation-1: -Not all of the blood that fills the heart by the end of diastole (end-diastolic volume or EDV) can be ejected from the heart during systole. Thus the volume left in the heart at the end of systole is the end-systolic volume (ESV). Thus, the stroke volume is not equal to the end-diastolic volume but the EDV-ESV.
Detailed explanation-2: -Stroke volume is the quantity of blood that the heart pumps out of the left ventricle with each beat. The formula for stroke volume is: Stroke volume = end-diastolic volume – end-systolic volume.
Detailed explanation-3: -The EDV is the filled volume of the ventricle prior to contraction and the ESV is the residual volume of blood remaining in the ventricle after ejection. In a typical heart, the EDV is about 120 mL of blood and the ESV is about 50 mL of blood. The difference in these two volumes, 70 mL, represents the SV.