EBK BIOLOGY
EBK BIOLOGY
10th Edition
ISBN: 8220100474729
Author: Martin
Publisher: Cengage Learning US
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Chapter 44.5, Problem 8LO
Summary Introduction

To define: The cardiac output, describe how it is regulated, and identify factors that affect it.

Introduction: The circulation of blood is carried out by the pumping of the heart. In the cardiac cycle, there are two main sounds produced during the closing of valves which are known as “lub-dup” sound. The “lub” sound marks the closing of AV (mitral and tricuspid) valves. However, the sound of “dup” sound in heart shows the closing of semi-lunar valves.

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