
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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oxygen(O) (ok�sĭ-jәn) a chemical element, atomic number 8, atomic weight 15.999. It is a colorless and odorless gas that makes up about 20 per cent of the atmosphere. In combination with hydrogen, it forms water; by weight, 90 per cent of water is oxygen. It is the third most abundant of all the elements of nature. Large quantities of it are distributed throughout the solid matter of the earth because it combines readily with many other elements. With carbon and hydrogen, oxygen forms the chemical basis of much organic material. Oxygen is essential in sustaining all kinds of life. Among the land animals, it is obtained from the air and drawn into the lungs by the process of respiration. See also blood gas analysis.

oxygen 15 an artificial radioactive isotope of oxygen having a half-life of 2.04 minutes and decaying by positron emission. It is used as a tracer in the measurement of regional blood volume and flow and oxygen metabolism by positron emission tomography.

hyperbaric oxygen oxygen under greater than atmospheric pressure.

liquid oxygen oxygen in liquid form, a common storage form of oxygen; one liter of liquid oxygen will produce 860 liters of gas.

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