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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.
respiratory system
the specialized organs, collectively, concerned with external respiration: in humans and other mammals it includes the trachea, bronchi, bronchioles, lungs, and diaphragm

respiratory system 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.
respiratory system

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.
respiratory system [(res-puh-ruh-tawr-ee)]

The organs in the body involved in respiration. Air enters the body through the nose and mouth and travels down the trachea, through the bronchial tubes, and finally into the lungs. Once in the lungs, the air is drawn into an enormous number of thin-walled sacs richly supplied with capillaries. The exchange of oxygen and carbon dioxide in the blood takes place in these tiny sacs.


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  • Respiratory tract

    respiratory tract n. The air passages from the nose to the pulmonary alveoli, including the pharynx, larynx, trachea, and bronchi. respiratory tract definition The path that air follows as it is inhaled and directed into the lungs. The respiratory tract includes the nose and nasal passages, the throat and trachea, and the bronchial tubes.

  • Respire

    verb (used without object), respired, respiring. 1. to inhale and exhale air for the purpose of maintaining life; breathe. 2. to breathe freely again, after anxiety, trouble, etc. verb (used with object), respired, respiring. 3. to breathe; inhale and exhale. 4. to exhale. verb 1. to inhale and exhale (air); breathe 2. (intransitive) to undergo […]

  • Respirometer

    [res-puh-rom-i-ter] /ˌrɛs pəˈrɒm ɪ tər/ noun 1. an instrument for measuring the extent of respiratory movement. 2. an instrument for measuring oxygen consumption or carbon dioxide production in an isolated tissue. respirometer res·pi·rom·e·ter (rěs’pə-rŏm’ĭ-tər) n. An instrument for measuring the degree and nature of respiration.

  • Respirometry

    [res-puh-rom-i-tree] /ˌrɛs pəˈrɒm ɪ tri/ noun 1. the branch of medical science dealing with the measurement and analysis of respiration.

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