Midi-chlorian was the scientific name[2] for a species of sentient and microscopic organisms that inhabited the cells of every life form.[1] Their existence was integral to the all-encompassing energy field known as the Force, connecting the Living Force to the Cosmic Force.[3] By serving as the link between the two aspects of the Force, the midi-chlorians made it possible to achieve immortality after death. With sufficient training[4] and total immersion in the light side of the Force,[5] the deceased could preserve their identity in the form of a Force spirit after becoming one with the Force.[4]