Animal: Difference between revisions
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''' | The word '''animal''' comes from the Latin ''animale'', which is derived from ''anima'', meaning "vital breath", and it refers to a class of living things. Animals are eukaryotic, meaning that they are comprised of [[cell]]s which contain a [[nucleus]]. Unlike [[bacteria]] and most [[protist]]s, they are usually multicellular (but see ''Myxozoa''). Unlike [[plant]]s and [[algae]], they generally digest food in an internal chamber. They differ from plants, algae, and fungi by lacking cell walls. Most animals can respond to changes in their environment, and most are [[motile]]. The animals are descended from [[choanoflagellate]]s. | ||
Revision as of 05:30, 29 July 2008
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Infrakingdom Eumetazoa
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The word animal comes from the Latin animale, which is derived from anima, meaning "vital breath", and it refers to a class of living things. Animals are eukaryotic, meaning that they are comprised of cells which contain a nucleus. Unlike bacteria and most protists, they are usually multicellular (but see Myxozoa). Unlike plants and algae, they generally digest food in an internal chamber. They differ from plants, algae, and fungi by lacking cell walls. Most animals can respond to changes in their environment, and most are motile. The animals are descended from choanoflagellates.