De or het wervelholte?

The correct Dutch article is:

de wervelholte

Rule Words ending in -te: usually de. See the rule

How to use wervelholte

the wervelholtede wervelholte
this wervelholtedeze wervelholte
that wervelholtedie wervelholte
our wervelholteonze wervelholte
your wervelholtejouw wervelholte
every wervelholteelke wervelholte
which wervelholte?welke wervelholte?
a big wervelholte / the big wervelholteeen grote wervelholte, de grote wervelholte