How would you demonstrate that the carbon dioxide is realeased during respiration
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oxygen is consumed by humans(us) from different parts of the body.Different
organs use oxygen to produce energy.Production of energy with the help of
oxygen inside the body.Carbon dioxide is released after respiration.Then
carbon dioxide is sent back to the lungs by blood.
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Take a glass or plastic bottle. Make a hole in its lid and fix it on the bottle.
Pour some freshly prepared lime water in the bottle. Insert a plastic straw through the hole in the lid in such a way that it dips in lime water.
Blow gently through the straw for a few times. The lime water in the glass or plastic bottle turns milky.
Exhaled air contains carbon dioxide gas because carbon dioxide gas turns limewater milky.
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