respiratory system


Definition of respiratory system

: a system of organs functioning in respiration and in humans consisting especially of the nose, nasal passages, pharynx, larynx, trachea, bronchi, and lungs

Illustration of respiratory system

Illustration of respiratory system

respiratory system: 1 nostril, 2 nose, 3 nasal cavity, 4 nasopharynx, 5 oropharynx, 6 larynx, 7 trachea, 8 bronchus, 9 lung

Examples of respiratory system in a Sentence

Recent Examples on the Web

But that doesn’t necessarily fix the problem if their lungs can’t properly inhale, exhale, or transport oxygen and carbon dioxide through their respiratory system. Korin Miller, SELF, "How Does Cancer Actually Kill Someone?," 15 Mar. 2019 Combining them creates peracetic acid, which is potentially toxic and can irritate the skin, eyes, and respiratory system. Lisa Freedman, Good Housekeeping, "6 Cleaning Products You Should Never, Ever Mix," 19 Dec. 2017 Many of these cleaners contain corrosive alkalis, which can have grave effects on your gastrointestinal track and respiratory system if inhaled and can be deadly if swallowed. Lindsey Campbell, House Beautiful, "19 Dangerous Household Items You Should Quit Using Immediately," 15 Feb. 2019 Every day, her muscle function and respiratory system weaken, the eventual cause of death for most patients. Sumathi Reddy, WSJ, "One Family’s Struggle to Get Their Daughter Lifesaving Medication," 20 Jan. 2019 Many red tides emit chemicals that can irritate human respiratory systems and damage fish nervous systems. Maya Sweedler, WSJ, "Florida’s Red Tide Stings Tourist Industry," 15 Aug. 2018 The respiratory system includes the nose, throat, voice box, windpipe and lungs. Guest Columnist/,, "The link between marijuana and lung disease: Melissa Martin (Opinion)," 1 Apr. 2018 The animal has two brains but a single respiratory system, digestive tract and body, according to SWNS. Fox News, "Rare two-headed snake discovered in backyard," 4 June 2018 Irritation in one's respiratory system and aggravated asthma can both be triggered by high ozone levels. Kimberly Rapanut, azcentral, "High pollution advisory in effect through Tuesday for Maricopa County," 25 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'respiratory system.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of respiratory system

1888, in the meaning defined above

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Last Updated

29 Mar 2019

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The first known use of respiratory system was in 1888

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More Definitions for respiratory system

respiratory system


Kids Definition of respiratory system

: a system of the body used in breathing that in human beings consists of the nose, nasal passages, pharynx, larynx, trachea, bronchial tubes, and lungs

respiratory system


Medical Definition of respiratory system

: a system of organs functioning in respiration and consisting especially of the nose, nasal passages, nasopharynx, larynx, trachea, bronchi, and lungs

called also respiratory tract

— see lower respiratory tract, upper respiratory tract

More from Merriam-Webster on respiratory system

Britannica English: Translation of respiratory system for Arabic Speakers Encyclopedia article about respiratory system

Comments on respiratory system

What made you want to look up respiratory system? Please tell us where you read or heard it (including the quote, if possible).


to speak slightingly about or to degrade

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