multicellular organism
an organism made up of many cells
A multicellular organism is an organism composed of many cells, each of which performs specialized functions to support the overall function of the organism. Multicellular organisms are found in all major groups of the tree of life, including animals, plants, fungi, and some protists.
Multicellularity allows for greater complexity and specialization within an organism, and enables more efficient nutrient exchange, waste removal, and reproduction. In multicellular organisms, cells communicate with one another through chemical signals and adhere to one another through specialized junctions.
Differentiation is a key characteristic of multicellular organisms, meaning that cells become specialized into different types with different functions. This differentiation is controlled by a combination of genetic and environmental factors, and results in the formation of tissues, organs, and systems that work together to support the overall function of the organism.
Examples of multicellular organisms include humans, trees, dogs, mushrooms, and seaweeds.
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