Bibliography:

Walker, Richard. "Chemical Mesages." Human Body. New York, NY: DK Pub., 2005. 44-45. Print.

Solz, Elizabeth Cooloidge. Human Biology and Health. Needham, MA: Pearson/Prentice Hall, 2007. Print.

Elizabeth Coolidge. Human Biology and Health. Needham, MA: Pearson/Prentice Hall, 2007. Print.

Dowshen, Steven. "Your Endocrine System." KidsHealth - the Web's Most Visited Site about Children's Health. Aug. 2009. Web. 27 Apr. 2011. <http://kidshealth.org/PageManager.jsp?lic=1&article_set=53855&cat_id=20607>.

"Diabetes in the US | Flickr - Photo Sharing!" Welcome to Flickr - Photo Sharing. Web. 07 June 2011. <http://www.flickr.com/photos/gdsdigital/4015686291/>.

"Endocrine 10 | Flickr - Photo Sharing!" Welcome to Flickr - Photo Sharing. Web. 07 June 2011. <http://www.flickr.com/photos/greenflames09/132171981/>.

"MODEL : BRAiN INFERiOR | Flickr - Photo Sharing!" Welcome to Flickr - Photo Sharing. Web. 07 June 2011. <http://www.flickr.com/photos/guccibear2005/165865686/>.