Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 42 - 42.2 - Concept Check: 2

Answer

The time difference allows blood to flow from the atria to the ventricles.

Work Step by Step

The movement of blood is not instantaneous. The delay between these electrical impulses allow the ventricles to actually fill before contracting.
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