Question

as a result of gaseous exchange,the composition of inhaled and exhaled air different .see the table below .approximate values are give in the table





1) why does the amount of oxygen vary between exhaled and inhaled air.

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Answer 1

Explanation:

because the concentration of o2 helps in diffusion of air as a result the air rich in o2 supply oxygen to body parts and the air having less o2 goes to lungs from lungs to outside leading to exhalation