Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 30, Digestive and Excretory Systems - Standardized Test Prep - Page 893: 2



Work Step by Step

Option A is incorrect. The teeth are involved in mechanical digestion. Option B is incorrect. Saliva contains amylase, which breaks down starches. Option C is incorrect. The stomach is the site where proteins are broken down and where some chemical digestion takes place. Option D is correct. The kidney is part of the excretory system, not the digestive system.
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