The autonomic nervous system has two divisions: The sympathetic division acts to energize the body, preparing it for action. The parasympathetic division acts to calm the body, allowing it to rest. Our everyday activities are controlled by the interaction between the sympathetic and parasympathetic nervous systems.
Update: N2Aos is now available for Kindle Fire HD and Kindle Fire HD 8.9. And you get the full Android experience here, including access to the Google Play store and all the other features offered by Android 4.2 (excepting what's not available via hardware, of course).
Amazon rolled out an update for its Fire OS to most Kindle Fire tablets. The update further removes owners from the Android experience. ZDNet's Zack Whittaker reported on the . Fire OS 3.1 updates the innards of Amazon's variant of the Android OS and adds several new features to the tablets as detailed by Whittaker. There's nothing particularly unique about this update from Amazon, and that's why Kindle Fire owners will like it.