From Facts in Motion.

Atoms: The building blocks of everything around us. But how small are they? This animation will show you.

Sources:
https://www.researchgate.net/publication/248399628_An_estimation_of_the_number_of_cells_in_the_human_body
http://book.bionumbers.org/how-big-is-a-human-cell/
https://foresight.org/Nanomedicine/Ch03_1.php
https://en.wikipedia.org/wiki/Atomic_radii_of_the_elements_(data_page)

Thanks for watching.
https://creativecommons.org/licenses/by/4.0/