:I've removed the outer margins from the inner tables in your example ( above ), but am not exactly certain it is stylistically " correct " per Wikipedia : Manual of Style guidelines . "'f red g andt "'23 : 43, 13 January 2012 ( UTC)
12.
The bones of the skull are in three layers : the hard compact layer of the external table ( " lamina externa " ), the diplo?( a spongy layer of red bone marrow in the middle, and the compact layer of the inner table ( " Lamina interna " ).
13.
Potentially this would work if there is an existing " borderless " class I can use on the inner table that overrides the " th " and " td " border value, but I can't find such a class; and I can't see how to insert my own CSS specs into a regular wikipedia article page.