found at:
Laurien, Leslie. Respiratory System -- Structure Detail. AMA. 6 May 2008 <http://www.ama-assn.org>.
found at:
Arcadian. Head and Neck Overview.http://training.seer.cancer.gov. Wikipedia. 6 May 2008 http://www.en.wikipedia.org/.
Found At: My Lungs. Webtech. 11 May 2008 <http://webtech.kennesaw.edu>.
Other Information Used on this Site:
"The Human Respiratory System." 20 Nov. 2007. 6 May 2008 http://users.rcn.com/.
Farabee, M.j. "The Respiratory System." EMC. 2001. 6 May 2008 <http://www.emc.maricopa.edu>.