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

Illustration of 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

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

This classic scent provides a minty fresh sensation that promotes clear breathing and a healthy respiratory system. —Bestreviews, Mercury News, 16 Feb. 2026

Word History

First Known Use

1811, in the meaning defined above

Rhymes for respiratory system

• cryptosystem
• ecosystem
• intersystem
• multisystem
• photosystem
• subsystem

Kids Definition

respiratory system

noun

: 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