Multicellular Organism

Multicellular Organism

Multicellular organisms are organisms that consist of more than one cell, in contrast to single-celled organisms. To form a multicellular organism, these cells need to identify and attach to the other cells.

Only a dozen or so species of life that can be seen with the naked eye are unicellular. The rest of the nearly two million visible species are multicellular. In particular all but one or two species of the million and a half animals are multicellular, as well as many plants and fungi. Some organisms are partially uni- and multicellular, like Dictyostelium.