Breathing is the process during which ______ is inhaled and carbon dioxide is exhaled.
When we inhale, we take air into our lungs. what do we breathe out during exhalation? options A :carbon dioxide option B: Nitrogen option C:Oxygen option
D: a mixture of gases that has more carbon dioxide than inhaled air optionE: a and c
What is the percentage of carbon dioxide in inhaled and exhaled air? [2 MARKS]