stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Human Body Flashcards | StudBud
Human Body
1 / 12
Why is the respiratory system so important?
A
Our body's cells need oxygen.
B
Our food must be broken down.
C
It exercises our lungs.
D
Our body's cells need carbon dioxide.
Next
0
0
correct · 0:00
