The Organic Door is a naturally occurring structure on the Pandoran surface. They are formed from thick roots that create natural barriers. They can be opened in a variety of manners depending on the door; the most common ones are linked with a Nerve Plant that can be triggered with a high pressure strike.
The Na'vi believe that some of these doors were intentionally placed by Eywa, and that only someone who is blessed can cause them to open.
Avatar: The Game[]
In the NDS Game, organic doors are a centerpiece to many puzzles. When Nok opened one such door it led to Onantu recognizing him as the Alaksi Nari.
Source[]
- James Cameron's Avatar: The Game (Nintendo DS) - Ingame Pandorapedia