Multicellular organism: Difference between revisions
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'''Multicellular organisms''' are those [[organism]]s consisting of more than one [[cell (biology)|cell]], and having differentiated cells that perform specialized functions. Most life that can be seen with the naked eye is multicellular, as are all [[animal]]s (i.e. members of the [[kingdom (biology)|kingdom]] Animalia) and [[plant]]s (i.e. members of the kingdom [[Plantae]]). |
'''Multicellular organisms''' are those [[organism]]s consisting of more than one [[cell (biology)|cell]], and having differentiated cells that perform specialized functions. Most life that can be seen with the naked eye is multicellular, as are all [[animal]]s (i.e. members of the [[kingdom (biology)|kingdom]] Animalia) and [[plant]]s (i.e. members of the kingdom [[Plantae]]). |
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A group of similarly differentiated cells performing a function in a multicellular organism is known as a [[biological tissue|tissue]]. Although some [[single-celled organism]]s, such as [[myxobacteria]], have [[differentiated cell]]s, 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 [[biological tissue|tissue]]. Although some [[microorganism|single-celled organism]]s, such as [[myxobacteria]], have [[differentiated cell]]s, the differentiation is less dramatic than that typically found in multicellular organisms. |
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Multicellular organisms must solve the problem of regenerating the whole from [[germ cell]]s (i.e. [[sperm]] and [[ovum|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 must solve the problem of regenerating the whole from [[germ cell]]s (i.e. [[sperm]] and [[ovum|egg]] cells), an issue that is studied in [[developmental biology]]. The overall spatial organization of differentiated cells is a topic of study in [[anatomy]]. |
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Multicellular organisms can suffer from [[cancer]], when cells fail to regulate their growth within the normal program of development. |
Multicellular organisms can suffer from [[cancer]], when cells fail to regulate their growth within the normal program of development. |
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== See also == |
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*[[unicellular]] |
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[[Category:Biology]] |
[[Category:Biology]] |
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Revision as of 00:07, 8 December 2005
Multicellular organisms are those organisms consisting of more than one cell, and having differentiated cells that perform specialized functions. Most life that can be seen with the naked eye is multicellular, as are all animals (i.e. members of the kingdom Animalia) and plants (i.e. members of the kingdom Plantae).
A group of similarly differentiated cells performing a function in a multicellular organism is known as a tissue. Although some single-celled organisms, such as myxobacteria, have differentiated cells, the differentiation is less dramatic than that typically found in multicellular organisms.
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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