I found this gorgeous animated short film, which was directed by Ishida YuYasushi. The stylization and charm reminds me of Studio Ghibli films or anything made by Mamoru Hosoda, the director of Summer Wars and The Girl who Leapt Through Time.
Kinesin is a protein that moves things around the cell. That filament is a protein strand that gives the cell structure. That vesicle is a big blob full of cellular product that the cell wants to transport somewhere else. It is driven by ATP hydrolysis. (Source)(Video)