|
|
Category:Respiratory systemThe 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. Articles in category "Respiratory system"There are 20 articles in this category.
|
|
08-19-2006 15:59:36
The contents of this article are licensed from Wikipedia.org under the GNU Free Documentation License. How to see transparent copy
The contents of this article are licensed from Wikipedia.org under the GNU Free Documentation License. How to see transparent copy
|
BiologyDaily.com 2005. Legal info |