The Amazing World of Cell Biology
If you haven’t seen the incredible microcosmic animation “The Inner Life of the Cell” by some very smart guys at Harvard University you should.
If this sort of stuff was around when I was at school…
http://aimediaserver.com/studiodaily/harvard/harvard.swf
Also, here is a version with a narrator explaining what it is we’re seeing: http://www.youtube.com/watch?v=UB6G9GD2KFk