Breath

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Breathing (sometimes called respiration) is the means by which our lungs remove carbon dioxide (CO2), a metabolic waste product from our system. The air going in and out of the mouth or nose when animals breathe is called the breath.

Removal of CO2 is necessary as CO2, when dissolved in water--the cell's solvent, creates carbonic acid which has a low pH making it acidic thus making the cell's surroundings acidic thus possibly inhibiting the normal function of enzymes required to maintain homeostasis.

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