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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 a voluntary action as it can be controlled. Respiration has two meanings one in physiology, while the other in cellular respiration. Respiration means the transport of oxygen from the air outside to the cells within the tissue and the transport of carbon dioxide from the lungs to the outside.