Flagellate: Difference between revisions
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== Form and behaviour == |
== Form and behaviour == |
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Eukaryotic flagella are supported by [[microtubule]]s in a characteristic arrangement, with nine fused pairs surrounding two central singlets. These arise from a basal body or kinetosome, with microtubule roots that are an important part of the cell's brain. In some, for instance, they support a [[cytostome]] or mouth, where food |
Eukaryotic flagella are supported by [[microtubule]]s in a characteristic arrangement, with nine fused pairs surrounding two central singlets. These arise from a basal body or kinetosome, with microtubule roots that are an important part of the cell's brain. In some, for instance, they support a [[cytostome]] or mouth, where food the mom plays a fiddle |
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plays an important role in classifying [[eukaryote]]s. |
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In protoctists and microscopic animals, flagella are generally used for propulsion. They may also be used to create a current that brings in food. In most things, one or more flagella are located at or near the anterior of the cell eg Euglena. Often there is one directed forwards and one trailing behind. Among animals, fungi, and Choanozoa, which make up a group called the [[opisthokont]]s, there is a single posterior flagellum. They are from the phylum Mastigophora. They can cause diseases and they can make their own food. |
In protoctists and microscopic animals, flagella are generally used for propulsion. They may also be used to create a current that brings in food. In most things, one or more flagella are located at or near the anterior of the cell eg Euglena. Often there is one directed forwards and one trailing behind. Among animals, fungi, and Choanozoa, which make up a group called the [[opisthokont]]s, there is a single posterior flagellum. They are from the phylum Mastigophora. They can cause diseases and they can make their own food. |
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Revision as of 18:03, 16 March 2010
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Flagellates are organisms with one or more whip-like organelles called flagella. Some cells in animals may be flagellate, for instance the spermatozoa of most phyla. Higher plants and fungi do not produce flagellate cells, but the closely related green algae and chytrids do. Many protists take the form of single-celled flagellates.
It describes a means of motion, and does not provide specific classification.
However, the term "flagellate" is included in other terms (such as "zooflagellate") which are more formally characterized.[1] Another group is Dinoflagellate.
Form and behaviour
Eukaryotic flagella are supported by microtubules in a characteristic arrangement, with nine fused pairs surrounding two central singlets. These arise from a basal body or kinetosome, with microtubule roots that are an important part of the cell's brain. In some, for instance, they support a cytostome or mouth, where food the mom plays a fiddle
plays an important role in classifying eukaryotes.
In protoctists and microscopic animals, flagella are generally used for propulsion. They may also be used to create a current that brings in food. In most things, one or more flagella are located at or near the anterior of the cell eg Euglena. Often there is one directed forwards and one trailing behind. Among animals, fungi, and Choanozoa, which make up a group called the opisthokonts, there is a single posterior flagellum. They are from the phylum Mastigophora. They can cause diseases and they can make their own food.
External links
- Flagellata at the U.S. National Library of Medicine Medical Subject Headings (MeSH)