Noun
the system for taking in oxygen and giving off carbon dioxide; in terrestrial animals this is accomplished by breathing
Source: WordNetLaughing is also good for your respiratory system. Allen Klein
Ever since then, all descendant vertebrates have had the forward end of the digestive system and the forward end of the respiratory system very much involved with each other. This manifests itself in the human body with a crossing of the two systems in the throat. George C. Williams
After a very high level of consumption, the respiratory system becomes depressed and the person will stop breathing. Source: Internet
Also in 1884, Jellinek demonstrated the effects of cocaine as a respiratory system anesthetic. Source: Internet
An avian respiratory system would need a lung volume of about convert compared with a mammalian requirement of convert, which would exceed the space available. Source: Internet
Because the virus attacks the respiratory system, many other nations have suffered extreme ventilator shortfalls under the crush of an outbreak. Source: Internet