respiratory system

Among quadrupeds, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. A diaphragm pulls air in and pushes it out. Respiratory systems of various types are found in a wide variety of organisms. Even trees have respiratory systems.
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Respiratory system n. The integrated system of organs involved in the intake and exchange of oxygen and carbon dioxide between the body and the [more]Respiratory system - Community and Resources

Noun
1. the system for taking in oxygen and giving off carbon dioxide; in terrestrial animals this is accomplished by breathing
(synonym) systema respiratorium
(hypernym) system
(part-holonym) body, organic structure, physical structure
(part-meronym) respiratory tract

The organs that are involved in breathing. These include the nose, throat, larynx, trachea, bronchi, and lungs.

[RES-pih-ra-tor-ee]
The organs that are involved in breathing. These include the nose, throat, larynx, trachea, bronchi, and lungs. Also called the respiratory tract.