I generally prefer to only post my own thoughts and findings but this is certainly amazing. More than that it is beautiful how the body works together to respond to our daily needs. It is a computer rendered scientifically sound video.
Easily Understood and Interesting Explanation of what is going on:
http://www.sciencechatforum.com/bulletin/viewtopic.php?p=24688
High Quality Video:
http://www.studiodaily.com/main/searchlist/6850.html
Harvard's Extremely Detailed Explanation of the Video:
http://multimedia.mcb.harvard.edu/media.html
Please enjoy!