What is called breating action?
1.In hale oxygen and expel carbon dioxide
2.inhalation of carbon dioxide and expulsion of oxygen
3.Fan air
4.none of these
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Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly to bring in oxygen and flush out carbon dioxide. ... The body's circulatory system transports these gases to and from the cells, where "cellular respiration" takes place.
Therefore option 1 is correct
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