Chapter 22, Problem 10CR

Summary Introduction

To describe:

The phases of the cardiac cycle.

Introduction:

A cardiac cycle includes all the events within the heart from the start of one heartbeat to the initiation of the next. During a single cardiac cycle, all chambers within the heart experience alternate periods of contraction and relaxation. The contraction of a heart chamber is called systole. The relaxation phase of a heart chamber is called diastole.