Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.6
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3469
Points per Word
0.000288
Page Count
48
Points per Page
0.020833
Series
True Book: Your Amazing Body
Description
A person breathes in and out about 17,000 times a day. The left lung is slightly smaller than the right, to make room for the heart. Learn all this and more in Respiratory System.