Category:Respiratory system
From Wikipedia, the free encyclopedia
The respiratory system is the biological system of any organism that engages in gas exchange. Even trees have respiratory systems, taking in carbon dioxide and emitting oxygen.
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The main article for this category is Respiratory system.
Pages in category "Respiratory system"
There are 50 pages in this section of this category.
*ABCEFG |
G cont.HLNP
R |
R cont.STV |
