Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
4.4
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
631
Points per Word
0.000792
Page Count
24
Points per Page
0.020833
Description
This book provides introductory text, color photography, and simple scientific diagrams that explain the functions and physical concepts of the respiratory system.