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Oxygen O - Chemical properties, Health and Environmental effects.
The oxygen in the Earth's' atmosphere comes from the photosyntesis of plants, and has built up in a long time as they utilised the abundant supply of carbon dioxide in the early atmosphere and released oxygen. Oxygen is fairly soluble in water, which makes life in rivers, lakes and oceans possible.
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How many trees does it take to produce oxygen for one person? - BBC Science Focus Magazine.
A human breathes about 9.5 tonnes of air in a year, but oxygen only makes up about 23 per cent of that air, by mass, and we only extract a little over a third of the oxygen from each breath.
Oxygen British Thoracic Society Better lung health for all.
Information on continuing prescriptions for long term oxygen therapy. Oxygen Alert Cards Help to ensure that patients receive the correct level of oxygen in an emergency by setting out appropriate target saturation levels see page 62 of the guideline or download here.
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Normal blood oxygen levels: What is safe, and what is low? Medical News Today.
In conjunction with oxygen therapy, these changes could help a person raise their oxygen saturation levels. A persons blood oxygen level refers to the amount of oxygen circulating in their blood. A person can measure their blood oxygen levels using a pulse oximeter.
Every breath you take: the process of breathing explained Nursing Times.
As a matter of fact, we spend much of our energy obtaining the sugar and oxygen we need to produce energy. We source carbohydrates from green plants or animals that have eaten green plants, and we source oxygen from the air.
Joseph Priestley, Discoverer of Oxygen National Historic Chemical Landmark - American Chemical Society.
Perhaps, Priestley wrote, the" injury which is continually done by such a large number of animals is, in part at least, repaired by the vegetable creation" Thus he observed that plants release oxygen into the air - the process known to us as photosynthesis.
What is oxygen? - BBC Bitesize.
Oxygen is a non-metal element that is a gas at room temperature. Its molecules contain two oxygen atoms. Oxygen is vital for respiration, which is the process that transfers energy from glucose to cells. Oxygen is necessary for burning to occur.

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