NB! Please note the inverted vertical axis in the latter part of the video 
(where the Centropages typicus male and female are animated in blue and red)


The two videoclips are identical but in different formats. If possible, choose the 
*.WMv version, which is of the smallest size and best quality. If it does not work
for you, chose the *.MPEG version

Just click on the icon, and it should play.

If you are unable to play any of the videoclips you should update your windows mediaplayer 
(http://www.microsoft.com/windows/windowsmedia/mp10/default.aspx)