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why do we need oxygen to survive

We all know that we cannot live without oxygen and that it enables life for almost all living organisms on our planet. But do we really understand why is so important to us and which body functions it supports? Let s begin at the beginning. 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 bodys energy. People can live about a month without food, a week without water and just few minutes without oxygen. When we inhale oxygen enters body through our mouth and nose and then travels all the way to the lungs.

When it gets to the smallest parts of the lungs (alveoli), those inflate like a balloon. Here oxygen enters capillary network and is bind to hemoglobin the protein molecule in red blood cells that carries oxygen from thePlungsPto all body s cells and then as a transport for waste gas, carbon dioxide, back to the lungs. The average adults lungs contain about 600 million alveoli. to utilize oxygen to produce ATP molecules, which are essential for many body processes,
to eliminate toxins and waste through oxidation. P Just like a car, humans also need fuel. We get it from the carbohydrates, fats, and proteins that were ingested through food or from storage body fat. With a help of oxygen, cells convert these into energy, so our body can function and create heat. We can say that more oxygen we inhale, more energy our cells can produce this makes our body stronger and well-prepared for daily challenges.

Because our body is not capable of storing oxygen, it is vital that we pay attention to our oxygen levels and take care of sufficient oxygen supply. The earth is surrounded by air, a mixture of extremely important gases such as oxygen, carbon dioxide and nitrogen. These gases provide animals with oxygen for respiration to occur. It also provides green plants with carbon dioxide for photosynthesis to happen. It is vital that living things respire to get the oxygen for living cells to function. Without air, there is no life. Plants use Carbon Dioxide (together with sunlight and water) to produce energy and give out Oxygen as a by-product. This oxygen is what almost all animals need to survive.

They absorb Carbon Dioxide from the air and discharge Oxygen through very tiny pores in the leaves. Air is also important for living organisms in the soil to survive and function. Without soil aeration, decomposers cannot work on organic matter to decompose them, as soil moisture alone is not enough for decomposition. Moving air (wind) is also important for some plants to pollinate. Animals including humans need oxygen to live. We breathe in oxygen and breathe out Carbon Dioxide. There are also air pockets in soils and water that help tiny living things survive in water and beneath the soils. For example, fishes absorb Oxygen from water with their gills. All animals are adapted with special organs and parts that help them absorb the oxygen they need from the air.

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