Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 10 - The Muscular System - Study Guide - Testing Your Recall - Page 373: 20

Answer

sphincter

Work Step by Step

A sphincter is a circular muscle that closes a body opening. An example of a sphincter muscle is the external anal sphincter.
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