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InterviewSolution
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1. Why do we need oxygen for breathing? |
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Answer» We all know that we cannot live without oxygen and that it enables life for almost all living organisms on our planet.We are breathing oxygen from the air, which contains approximately 78 percent nitrogen and 21 percent oxygen. In average, human inhales and exhales around 16-times a minute in order to get enough oxygen to stay alive. Incredibly, the most prevalent element in our body is oxygen – oxygen makes up 65 percent of human body and is responsible for 90 percent of the body’s energy. Cells need oxygen mainly for two functions: 1.to utilize oxygen to produce ATP – molecules, which are essential for many body processes, 2.to eliminate toxins and waste through oxidation. because oxygen mix with our blood and form oxy-haemoglobin by which we get energy to do work. so we need oxygen for doing daily work |
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