The words "respiratory" and "respiration" refer to the lungs and breathing.
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.
Lungs - illustration
Upper respiratory tract - illustration
Upper respiratory tract
Lower respiratory tract - illustration
Lower respiratory tract
Review Date: 10/20/2022
Reviewed By: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.