Toggle Navigation
Games
Blog
News
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
News
Contact us
Help center
Sign in
Study
Respiration
0
%
0
0
0
Back
Restart
?
Carbon dioxide
Oops!
Okay!
?
Lungs
Oops!
Okay!
?
Blood
Oops!
Okay!
?
Nose
Oops!
Okay!
?
Breathing out
Oops!
Okay!
?
Trachea
Oops!
Okay!
?
Respiration
Oops!
Okay!
?
Breathing in
Oops!
Okay!
?
Diaphragm
Oops!
Okay!
?
Oxygen
Oops!
Okay!
?
Alveoli
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies