I somehow differ with your opinion ereitz. However your reply did made me think about something that might improve the animation.

How about relating the movement of the cells to the actual hearthbeat? I mean, make them rush as if being pumped, then they stop for a microsecond and then pump again, stop .. pump. When I say stop it´s more of a suspended state, and it shouldn´t last more than a microsec.

I like VERY much the animation K.
You´ll get the gig!