Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.7
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4436
Points per Word
0.000225
Page Count
40
Points per Page
0.025
Series
Mission: Science
Description
Coordinating text and photographs explain the physiology and functions of the human body's twelve unique systems and how they work with one another to keep the body running smoothly.