Which organ stores glucose as an energy reserve?

Explanation

The liver is a vital organ in vertebrates and some other animals. It regulates the metabolism and ensures a constant 'inner environment'. A human liver is red-brown and weighs approximately 1.5 kg. It produces bile (for the gall bladder) which is important for the fat absorption in the colon. It also detoxifies and cleans the blood and produces a whole range of important proteins, including e.g. cholesterol. Finally, it stores glucose as an energy reserve for the body.