Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 23 - The Digestive System - Review Questions - Page 904: 23b

Answer

The walls must be able to deal with abrasion.

Work Step by Step

The walls must be able to deal with abrasion.
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