Lungs, mostly. SARS is used to describe the closing of the bronchia and bronchioles.
The respiratory system is the system that handles breathing.
I sincerely suggest that you should describe your question more specifically because diseases of many kinds could have developed in human respiratory system and I don't know what problem is bothering you.
The Respiratory System
The trachea is the airway in the respiratory system.
they permit exchange between the external atmosphere and the circulatory system.
no, they do not have a respiratory system
The respiratory system.
Respiratory system
how does the respiratory system work
1. Respiratory system 2. Cardiovascular system
The lungs are part of the respiratory system! they help the circulatory by giving oxygen, but they are just respiratory.