Question

Air from which oxygen has been removed

Answer 1

Answer:

trees gives us oxygen .

Answer 2

Answer:

If your question is "What happens to the oxygen which has been removed from inhaled hair" then here's your answer-

Inhaled oxygen enters the lungs and reaches the alveoli, Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.

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