[support] get parent taxonomy tree?

Hi, Is there a function to get the parent tree? for example, the full path for term '15' is website.com/taxonomy_menu/3/10/15 . Right now, I use taxonomy_get_parents(15) and get to 10..then call it again until I find '0'. Is there a function that either returns the full path of the term or returns the hierarchy tree? taxonomy_get_parents_all seems to do something completely different... Thanks, V