why oxygen is necessary for living organisms
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Oxygen is necessary for the survival of living beings as it provides energy to us do our daily activities. Oxygen react with glucose in each cell of our body to give energy (38ATP) and carbon dioxide. Oxygen is necessary for us because all living beings need Oxygen for respiration.
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Why do we breathe? (We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) What happens in the process of respiration? (Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.
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