Question

air is mixture of gases?but how only oxygen goes into body?

Answer 1

By volume, air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. ... At the same time, carbon dioxide-nitrogen mix moves from the capillaries into the air sacs.

Answer 2

The oxygen content in air is more than other minor gases and when we inhale there is carbon dioxide also which gets inside our body along with nitrogen,argon and is removed when we exhale.The oxygen is consumed by our body!

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