Essentials of Human Anatomy & Physiology (12th Edition)

Published by Pearson
ISBN 10: 1292216239
ISBN 13: 978-1-29221-623-2

Chapter 11 - The Cardiovascular System - Review Questions - Page 421: 21

Answer

Pericardial sac contains a serous fluid which provides lubrication to the pericardial layers. It reduces friction between visceral and parietal pericardium. This makes the beating of heart more efficient.

Work Step by Step

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