The words "respiratory" and "respiration" refer to the lungs and breathing.
Respiration
Dezube R. Overview of the respiratory system. Merck Manual Consumer Version website. www.merckmanuals.com/home/lung-and-airway-disorders/biology-of-the-lungs-and-airways/overview-of-the-respiratory-system. Updated September 2022. Accessed January 17, 2023.