BIOLOGY
BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 48, Problem 1COQ
Summary Introduction

To describe: The cardiac cycle and also explain the reason that heart valves must open in only one direction.

Introduction: Heart is the main organ of a circulatory system. It pumps the blood and fulfills the requirement of various body systems. Oxygenation of various systems is one of the major functions of the circulatory system. The circulatory system consists of arteries, veins, capillaries, and heart.

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The Cardiovascular System: An Overview; Author: Strong Medicine;https://www.youtube.com/watch?v=Wu18mpI_62s;License: Standard youtube license