At the head of the planarian there is a brain under the eyespots. From the brain, there are two nerve cords, which connect at the tail. There are many transverse nerves connected to the nerve cords, which make it look like a ladder. With a ladder-like nerve system it is able to respond in a coordinated manner.
Adventure mode. From Diablo Wiki. Adventure Mode or AM is the primary end game type of game mode introduced into Diablo 3 in the Reaper of Souls expansion pack. Campaign Mode or Story Mode is the other primary game mode, where players must progress through the acts in order, complete quests, talk to NPCs, watch cut scenes, etc.
AdventureQuest 3D has a new saga for players to work through in one of the only true cross platform MMOs on the market. Called Dragons of Ashfall, the new content is available for PC via Steam, on Google Play and the App Store. The level cap has been increased to 16 and players can travel through DoomWood to Ashfall.