Biology
Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Chapter 47, Problem 7TY
Summary Introduction

Introduction: The cardiac cycle is divided into different phases based on the contraction and relaxation of the atria and ventricles of the heart. The contraction phase is called systole, and the relaxation phase is called diastole. The heart undergoes one atrial systole and atrial diastole and one ventricular systole and one ventricular diastole.

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