What is breathing ? Why is oxygen essential for human and animal life?
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Humans get the oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells the ability to break down food in order to get the energy we need to survive. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.
Animals need oxygen to survive. In fact, all organisms need oxygen to complete the process to burning glucose for fuel. It's purpose is to bring oxygen into your body. One of the products of cellular respiration is carbon dioxide.
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Breathing is the process of inhale and exhale of oxygen and carbon dioxide
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