Each functional component of an Umwelt has a meaning and so represents the organism’s model of the world. It is also the semiotic world of the organism, including all the meaningful aspects of the world for any particular organism, i.e. it can be water, food, shelter, potential threats, or points of reference for navigation. An organism creates and reshapes its own Umwelt when it interacts with the world. This is termed a ‘functional circle’. The Umwelt theory states that the mind and the world are inseparable, because it is the mind that interprets the world for the organism. Consequently, the Umwelten of different organisms differ, which follows from the individuality and uniqueness of the history of every single organism. When two Umwelten interact, this creates a semiosphere.[2][3]