★ Breathing System Quiz
What is the percentage of nitrogen in inhaled air?
A. 78%
B. 21%
C. 0.04%
D. Variable
Preview next quiz:
What happens to our chests when we breathe?
A. They get bigger when we inhale and smaller when we exhale
B. They get smaller when we inhale and bigger when we exhale
C. They stay the same size when we inhale and exhale
D. They move up and down when we inhale and exhale
Disclaimer:
Medical Quiz should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational and educational purposes only.