Similar to the NFT, aeroponic systems have bare plant roots suspended in little or no growing medium. Rather than flowing through the system, nutrient solution is continually misted on the suspended roots, allowing for maximum uptake of water, nutrients and oxygen. This is perhaps the most efficient hydroponic delivery system, but also the most intricate. Like the drip system, there are numerous small parts that need to be purchased, cleaned and maintained. This hydroponics system is usually achieved by suspending the plants on top of a chamber in which the roots hang down and are periodically misted. By misting the nutrients onto the root zone the plants are able to break down and uptake the nutrients more efficiently. Also by having no growing media for the plant to search through/waste energy it allows the plant to focus the majority of its energy in above ground production making for vigorous growth and yields, as in all hydroponic systems.