alleryStart learning →How much blood does a resting adult's ventricle hold at the end of atrial systole?
AAbout 130 mL
BAbout 70 mL
CAbout 200 mL
DAbout 250 mL
Answer & Solution
Correct answer: A. About 130 mL
1. Atrial systole tops up the ventricles just before they contract.
2. At that point the ventricles contain approximately 130 mL of blood in a resting adult standing up.
3. This volume is named the end diastolic volume, or preload.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_
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