Zooid: Difference between revisions
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{{distinguish|zoid}} |
{{distinguish|zoid}} |
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{{Unreferenced|date=October 2011}} |
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A '''zooid''' or '''zoöid''' {{IPAc-en|ˈ|z|oʊ|.|ɔɪ|d}} is a single animal that is part of a [[colony (biology)|colonial]] animal. The zooids can either be directly connected by tissue (e.g. [[coral]]s, [[Catenulida]], [[Siphonophorae]], [[Pyrosome]] or [[Ectoprocta]]) or share a common exoskeleton (e.g. [[Bryozoa]] or [[Pterobranchia]]). The colonial organism as a whole is called a ''zoon'' {{IPAc-en|ˈ|z|oʊ|.|ɒ|n}}, plural ''zoa'' (from [[greek language|Greek]] ''zòon'' ζώον meaning animal; plural ''zòa'', ζώα). |
A '''zooid''' or '''zoöid''' {{IPAc-en|ˈ|z|oʊ|.|ɔɪ|d}} is a single animal that is part of a [[colony (biology)|colonial]] animal. The zooids can either be directly connected by tissue (e.g. [[coral]]s, [[Catenulida]], [[Siphonophorae]], [[Pyrosome]] or [[Ectoprocta]]) or share a common exoskeleton (e.g. [[Bryozoa]] or [[Pterobranchia]]). The colonial organism as a whole is called a ''zoon'' {{IPAc-en|ˈ|z|oʊ|.|ɒ|n}}, plural ''zoa'' (from [[greek language|Greek]] ''zòon'' ζώον meaning animal; plural ''zòa'', ζώα). |
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The term ''zooid'' has historically also been used for an organic cell or organized body that has independent movement within a living organism, especially a [[motility|motile]] [[gamete]] such as a [[spermatozoon]] (in the case of algae now [[zoid]]), or an independent animal-like organism produced asexually, as by [[budding]] or [[fission (biology)|fission]]. |
The term ''zooid'' has historically also been used for an organic cell or organized body that has independent movement within a living organism, especially a [[motility|motile]] [[gamete]] such as a [[spermatozoon]] (in the case of algae now [[zoid]]), or an independent animal-like organism produced asexually, as by [[budding]] or [[fission (biology)|fission]]. |
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== ZOOIDS IN CNIDARIAN COLONIES == |
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Phylum Cnidaria contains many well known examples of zooids |
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.Physalia (Portuguese man of war ) is classical example of zooids . |
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Its colony contains aurophores, Dactylozoids, gonozooids, pneumatophores etc. |
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for various functions . Pneumatophore is ment for movement . |
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Gonozoids help in reproduction . Dactylozoids help in nutrition . |
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<ref>Invertebrate Zoology Barns , Roberts D ; pp135-136</ref> |
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==References== |
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{{Reflist}} |
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[[Category:Zoology]] |
[[Category:Zoology]] |
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Revision as of 06:15, 12 January 2015
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A zooid or zoöid /ˈzoʊ.ɔɪd/ is a single animal that is part of a colonial animal. The zooids can either be directly connected by tissue (e.g. corals, Catenulida, Siphonophorae, Pyrosome or Ectoprocta) or share a common exoskeleton (e.g. Bryozoa or Pterobranchia). The colonial organism as a whole is called a zoon /ˈzoʊ.ɒn/, plural zoa (from Greek zòon ζώον meaning animal; plural zòa, ζώα).
The term zooid has historically also been used for an organic cell or organized body that has independent movement within a living organism, especially a motile gamete such as a spermatozoon (in the case of algae now zoid), or an independent animal-like organism produced asexually, as by budding or fission.
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