Garganta

is how Arrancar move to and from Hueco Mundo. It literally tears open the dimensional fabric separating the worlds, revealing a tunnel of whirling, torrential energy that must be focused and solidified to create a discernible pathway. It is primarily used by Hollow and Arrancar, but some other characters have used it through different means.

There is also another use for Garganta, only shown once: Garganta Broadcast, a visual broadcast similar to a television screen, created by using individual Garganta portals. Ulquiorra does this in order to show the current predicament of Orihime's friends (Ichigo, Hitsugaya and Matsumoto) fighting their respective battles, stating he could kill them if she says anything other than "yes". It is unknown if he could create as many as desired, or if three broadcasts are his limit.

All Menos Class Hollows and Arrancar are capable of opening a Garganta.