Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 47 - The Digestive System - Review Questions - Synthesize: 5

Answer

Birds have a similar range of diets to mammals (herbivores to carnivores), and they use grit ad stones in their gizzards to grind material. The grit and stones act like mammalian teeth.

Work Step by Step

Look at avian digestion: the gizzard is the grinding organ, which makes it analogous in some ways with the mouth, containing teeth, in mammals.
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