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Encyclopedia > Multicellular

Multicellular organisms are those organisms containing more than one cell, and having differentiated cells that perform specialized functions. Most life that can be seen with the naked eye is multicellular; all animals (i.e. members of the kingdom Animalia) and plants (i.e. members of the kingdom Plantae) are.


Although some single-celled organisms have differentiated cells (e.g. myxobacteria), the differentiation is less dramatic than that typically found in multicellular organisms. A group of similarly differentiated cells performing a function in a multicellular organism is known as a tissue.


Multicellular organisms must solve the problem of regenerating the whole from germ cells (i.e. sperm and egg cells), an issue that is studied in developmental biology. The overall spatial organization of differentiated cells is a topic of study in anatomy. Multicellular organisms can suffer from cancer when cells fail to regulate their growth within the normal program of development.


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  Results from FactBites:
 
Multicellular organism - Wikipedia, the free encyclopedia (165 words)
Multicellular organisms are those organisms containing more than one cell, and having differentiated cells that perform specialized functions.
A group of similarly differentiated cells performing a function in a multicellular organism is known as a tissue.
Multicellular organisms can suffer from cancer when cells fail to regulate their growth within the normal program of development.
Multicellular stage, Animals (5002 words)
The evolution of multicellular plants is a separate branch of evolution.
This potential is actualized mainly in multicellular animals because of the evolution of a series of level of neurological organization in them, but before we trace those stages, let us catalogues all the other animals to see how multicellular animals are related to all the other kinds of animals.
Multicellular animals direct behavior at other objects by the contraction of muscle cells located where the muscles are needed to change the body’s shape, and neurons generate behavior by controlling the relevant muscles.
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