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What is respiration? How does it occur?...

What is respiration? How does it occur?

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i.Respiration involves release of energy by oxidation of food.
ii. Respiration involves takingin oxygen-rich air and giving out air containing carbon dioxide with the help of respiratory organs.
iii. The oxygen inhaled during respiration is used for cellular respiration to oxidize food and release energy in the form of ATP.
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