Breathing - is the movement of air in and out of the lungs by the action of thoracic muscles and rib cage., Inhalation - Intake of air into the lungs., Exhalation - The release of air from the lungs., Inspiration - Synonym for inhalation., Expiration - Synonym for exhalation., Ventilation - Synonym for breathing., Diaphragm - One of the major muscles involved in breathing.,

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