: 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
1 nostril
2 nose
3 nasal cavity
4 nasopharynx
5 oropharynx
6 larynx
7 trachea
8 bronchus
9 lung
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Volcanic tephra can irritate eyes, skin and the respiratory system, according to county officials.—ABC News, 10 Mar. 2026 People with sensitive respiratory systems are urged to stay inside.—Devoun Cetoute, Miami Herald, 5 Mar. 2026 Even without oils, room sprays can release chemicals into the air that can irritate sensitive respiratory systems.—Mary Cornetta, Better Homes & Gardens, 3 Mar. 2026 Brooms get at crumbs, but to rein in the teeny-tiny particles that irritate your respiratory system, swab down or squeegee once a week.—Nashia Baker, Martha Stewart, 19 Feb. 2026 See All Example Sentences for respiratory system
: a system of organs used in breathing that in human beings consists of the nose, nasal passages, pharynx, larynx, trachea, bronchi and lungs
Medical Definition
respiratory system
noun
: a system of organs functioning in respiration and in humans consisting especially of the nose, nasal passages, pharynx, larynx, trachea, bronchi, and lungs : respiratory tract