THE 17th CENTURY
'(<a href="http://www.j-archive.com/media/2010-04-05_J_04.jpg" target="_blank">Jimmy of the Clue Crew shows a micrograph on the monitor.</a>)  In the 1660s, Robert Hooke looked at cork under a microscope; the empty spaces reminded him of a monastery's rooms, so he called him these'
cells