BIOLOGY:ESSENTIALS NSU (LL)-W/ACCESS
BIOLOGY:ESSENTIALS NSU (LL)-W/ACCESS
3rd Edition
ISBN: 9781265143862
Author: Hoefnagels
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 27.4, Problem 3MC
Summary Introduction

To determine:

The way in which a heartbeat originates and propagates.

Introduction:

The heart is made up of tough involuntary cardiac muscles. Blood enters and moves out of the heart through contraction and relaxation of the chambers. This process of contraction and relaxation of the chambers of the heart is known as the cardiac cycle. 1 cardiac cycle is equivalent to 1 heartbeat. A human heart beats more than 2.5 billion times in a lifetime.

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