Define end-diastolic volume (EDV).

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Prepare for the Ivy Tech Anatomy and Physiology II (APHY 102) Heart Test with multiple-choice questions, detailed explanations, and study resources. Enhance your understanding and excel in your exam!

Multiple Choice

Define end-diastolic volume (EDV).

Explanation:
End-diastolic volume is the amount of blood in a ventricle at the end of the filling phase, right before the heart contracts. It represents the preload—the volume available to be ejected during the next beat. The bigger this filling volume (within normal limits), the more forcefully the ventricle can contract and the greater the stroke volume, via the Frank-Starling relationship. This is different from the volume left in the ventricle after contraction (end-systolic volume) and from the amount ejected per beat (stroke volume, which is EDV minus end-systolic volume).

End-diastolic volume is the amount of blood in a ventricle at the end of the filling phase, right before the heart contracts. It represents the preload—the volume available to be ejected during the next beat. The bigger this filling volume (within normal limits), the more forcefully the ventricle can contract and the greater the stroke volume, via the Frank-Starling relationship. This is different from the volume left in the ventricle after contraction (end-systolic volume) and from the amount ejected per beat (stroke volume, which is EDV minus end-systolic volume).

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