A Leukocyte Goes About Its Business...
Ah. Here this is with its narration:
In some ways, I think it is better without the narration--without the dry description of what is going on. It is in a sense more marvelous when it is incomprehensible, or rather uncomprehended.
See also:
http://delong.typepad.com/sdj/2006/10/yet_more_on_ins.html
http://delong.typepad.com/sdj/2006/10/biologists_weep.html
http://sparkleberrysprings.com/v-web/b2/index.php?p=737&c=1