What is breathing?

Breathing is the act of taking in and expelling air from the lungs.
bronchial b. A harsh, blowing quality of the breath heard on auscultation of the chest;
often heard over a consolidated lung or over a cavity in the lung.
continuous positive pressure b. See continuous positive pressure ventilation, under ventilation.
intermittent positive pressure b. See intermittent positive pressure
ventilation, under ventilation.
mouth b. Habitual breathing through the open mouth.
mouth-to-mouth b. A stage in cardiopulmonary resuscitation in which the rescuer places his mouth completely over the victim’s mouth and delivers two slow, independent breaths, while maintaining the victim’s airway open and allowing time for the victim to exhale before delivering the second breath; each breath lasts 1.5 to 2 seconds; if after the second breath normal breathing is still absent but carotid pulse is present, then breathing is again delivered, at the rate of about 12 breaths per minute. Also called mouth-to-mouth resuscitation.
pursed-lip b. A technique of breathing in which air is exhaled through pursed lips in
order to slow down the outflow of air from the lungs; it relieves airway discomfort in chronic obstructive pulmonary disease.

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