Websites+Used

= = =**__Works Cited__**=

**Internet Sources**
http://www.texasheart.org/HIC/ANATOMY/

http://www.fi.edu/learn/heart/systems/respiration.html

[]

[]

[]

[]

**Written Sources**
Essentials of Human Anatomy & Physiology-Eighth Edition Elaine N. Marieb, R.N., PH D. ISBN 0-8053-7328-4 (text) QP34.5.M264 2006 612-dc22 2004060029