WORD ORIGIN noun . Anatomy the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs. Origin of respiratory system
First recorded in
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for respiratory system noun the specialized organs, collectively, concerned with external respiration: in humans and other mammals it includes the trachea, bronchi, bronchioles, lungs, and diaphragm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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respiratory system in Medicine n. The integrated system of organs involved in the intake and exchange of oxygen and carbon dioxide between the body and the environment and including the nasal passages, larynx, trachea, bronchial tubes, and lungs.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
respiratory system in Science The system of organs and structures in which gas exchange takes place, consisting of the lungs and airways in air-breathing vertebrates, gills in fish and many invertebrates, the outer covering of the body in worms, and specialized air ducts in insects.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
respiratory system in Culture respiratory system [(res-puh-ruh-tawr-ee)]
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.