Works Cited

Baffa, Gina. "Your Heart & Circulatory System." KidsHealth - the Web's Most Visited Site about Children's Health. June-
July 2008. Web. 01 June 2011. <http://kidshealth.org>.

Dowshen, Steven. "What Are Varicose Veins?" KidsHealth - the Web's Most Visited Site about Children's Health. Oct.
2010. Web. 01 June 2011. <http://kidshealth.org>.

"Heart Attack Anatomy | Flickr - Photo Sharing!" Welcome to Flickr - Photo Sharing. Web. 07 June 2011.
<http://www.flickr.com/photos/gandhiji40/395241000/>.

Houghton, Gillian. Blood: the Circulatory System. New York: PowerKids, 2007. Print.

"Human Body Blood Vessels." Web. <www.flickr.com/photos/ perpetualplum/3953080641/>.

Padilla, Michael J., Martha Cyr, and Ioannis Miaoulis. Prentice Hall Science Explorer: Human Biology and Health.
Needham, MA: Pearson Prentice Hall, 2005. Print.

Red Blood Cells. Web. <mediaspin.com/ blog/?paged=17>.