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pursed-lip breathing a breathing technique in which air is inhaled slowly through the nose and then exhaled slowly through pursed lips. This type of breathing is often used by patients with chronic obstructive pulmonary disease to prevent small airway collapse.
Breathing is the exchange of gases between the cells of an organism and the external evironment.In simple words: Ventilation ,or bringing oxigen into the lungs and Circulation ,or transporting the oxigen all over the body, where is needed.reathing is the exchange of gases between the cells of an organism and the external evironment.