oxygen important to us

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Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbesWhy is oxygen important? Oxygen is essential for respiration because the body uses it to 'burn' food molecules. Animals take in oxygen when inhaling and give off carbon dioxide when exhaling. Oxygen makes up almost 21% of the total gases in air, with most of the remaining gas being physiologically inert nitrogenOxygen in cells occurs with carbon and hydrogen in most organic compounds that have either structural or metabolic functions. ... It is important for such significant biological processes as DNA synthesis, enzymes activation, cellular cycle regulation, gene transcription activation, and apoptosisAnimals need oxygen (O) 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 dioxideEven though oxygen is not a heat-trapping greenhouse gas, its concentration in our atmosphere can affect how much sunlight reaches the ground, and new models suggest that effect has altered climate in the past. ... “Oxygen is produced as a waste product of photosynthesisIf the world lost its oxygen for five seconds, the earth would be an extremely dangerous place to live in. Due to the severe sunburn, our inner ear would explode. The air pressure on the earth would drop 21 per cent and our ears would not get enough time to settleMost of the breathable oxygen in Earth's atmosphere is supplied by plant life in a process called photosynthesis . We'll run out of it if we cut down too much of the world's forests and kill too much plant life in the oceans. ... As long as we sustain Earth's plant life in sufficient quantity, we won't run out of oxygen.