When we breathe in, we inhale many gases, including oxygen.… | CGP Edu

Biology Breathing and Exchange of Gases Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

When we breathe in, we inhale many gases, including oxygen. What happens to the gases that the body can't use?

A

They are exhaled.

B

They are changed into oxygen by the lungs.

C

They circulate through the body and are disposed off later.

D

They are absorbed into the digestive system and used to create energy.

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