Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
3.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
3390
Points per Word
0.000147
Page Count
48
Points per Page
0.010417
Description
This Freestyle Express edition explains how the parts of the respiration and circulation systems work and illustrates the actions and functions of breathing, talking, the heart and blood flow.