The Respiratory System
by Glass, Susan
Series:Reading Essentials in Science · Human Body (Perfection Learning)
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AR Book Level
6.1
AR Points
1
Word Count
6,695
Interest Level
Middle Grades (MG 4-8)
Genre
Nonfiction
AR Quiz #
74937 EN
About this book
This book discusses how the respiratory system is designed to bring essential oxygen into the body and remove useless carbon dioxide. The body's cells need oxygen to change nutrients from food into the energy they need to perform their jobs.