Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 18 - The Cardiovascular System: The Heart - Review Questions - Page 690: 16

Answer

We can see the P wave happens because of the conduction of the SA node that goes through the atria. Now the QRS complex happens because of the ventricular depolarization that happens before the ventricular contraction. The shape of it shows the difference of sizes among the ventricles and the period of time it takes for it to depolarize.Finally the T wave happens due to the ventricular repolarization.

Work Step by Step

We can see the P wave happens because of the conduction of the SA node that goes through the atria. Now the QRS complex happens because of the ventricular depolarization that happens before the ventricular contraction. The shape of it shows the difference of sizes among the ventricles and the period of time it takes for it to depolarize.Finally the T wave happens due to the ventricular repolarization.
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