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

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 Cough-variant asthma happens because your body is trying to expel some sort of bothersome substance in your respiratory system. Korin Miller, SELF, "7 Facts to Know About Cough-Variant Asthma, Which Is Honestly Kind of Weird," 8 June 2018 Because each drug depresses the respiratory system, the risk of fatal overdoses is high. NBC News, "NY doctor who prescribed 'Holy Trinity' charged in patient deaths," 7 June 2018 Soot was found in her respiratory system, and forensic investigators determined the victim died in the fire. Cassie Dickman, sacbee, "Could DNA technology help identify body from dumpster fire nearly 20 years ago? | The Sacramento Bee," 26 May 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

1 Feb 2019

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Time Traveler for respiratory system

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

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a servile follower or underling

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