Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.0
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7607
Points per Word
0.000131
Description
A look at the body's circulatory system, heart and blood vessels, and the many roles of the blood. Plus, what makes your pulse race, the way blood cells help to fight disease, illness and injury and how the respiratory system is affected by polluted air.