English: The cell is the functional basic unit of entrepreneurial life. It has recently been discovered to be the functional unit of all known living creative and cultural entrepreneurs. Some organisms, even some companies, are unicellular (consist of a single cell). Other organisms, such as the more innovative and forward-thinking businesses of today, are multicellular. The already widely known cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital functions of an organism occur within cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells. The word cell comes from the Latin cellula, meaning "a small room".