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- Planarian abstract "A planarian is one of many non-parasitic flatworms of the Turbellaria class. It is also the common name for a member of the genus Planaria within the family Planariidae. Sometimes it also refers to the genus Dugesia.Planaria are common to many parts of the world, living in both saltwater and freshwater ponds and rivers. Some species are terrestrial and are found under logs, in or on the soil, and on plants in humid areas.Some planarians exhibit an extraordinary ability to regenerate lost body parts. For example, a planarian split lengthwise or crosswise will regenerate into two separate individuals. Some planarian species have two eye-spots (also known as ocelli) that can detect the intensity of light, while others have several eye-spots. The eye-spots act as photoreceptors and are used to move away from light sources. Planaria have three germ layers (ectoderm, mesoderm, and endoderm), and are acoelomate (they have a very solid body with no body cavity). They have a single-opening digestive tract; in Tricladida planarians this consists of one anterior branch and two posterior branches.Planarians move by beating cilia on the ventral dermis, allowing them to glide along on a film of mucus. Some also may move by undulations of the whole body by the contractions of muscles built into the body membrane.Triclads play an important role in watercourse ecosystems and are often very important as bio-indicators.The most frequently used planarian in high school and first-year college laboratories is the brownish Girardia tigrina. Other common species used are the blackish Planaria maculata and Girardia dorotocephala. Recently, however, the species Schmidtea mediterranea has emerged as the species of choice for modern molecular biological and genomic research due to its diploid chromosomes and the existence of both asexual and sexual strains. Recent genetic screens utilizing double-stranded RNA technology have uncovered 240 genes that affect regeneration in S. mediterranea. Many of these genes have orthologs in the human genome.".
- Planarian thumbnail Polycelis_felina.jpg?width=300.
- Planarian wikiPageExternalLink planaria.neuro.utah.edu.
- Planarian wikiPageExternalLink planform.daniel-lobo.com.
- Planarian wikiPageExternalLink planarian.
- Planarian wikiPageExternalLink live-forever-immortal-worms.
- Planarian wikiPageExternalLink alejandro-sanchez-alvarado-part-2.html.
- Planarian wikiPageExternalLink 0,1286,67404,00.html.
- Planarian wikiPageExternalLink watch?v=eUmOJ6fWN9w.
- Planarian wikiPageExternalLink watch?v=w0QzSYQGsnA.
- Planarian wikiPageID "455186".
- Planarian wikiPageRevisionID "606312359".
- Planarian hasPhotoCollection Planarian.
- Planarian subject Category:Model_organisms.
- Planarian subject Category:Negligibly_senescent_organisms.
- Planarian subject Category:Turbellaria.
- Planarian type Animal.
- Planarian type BiologicalLivingObject.
- Planarian type EukaryoticCell.
- Planarian comment "A planarian is one of many non-parasitic flatworms of the Turbellaria class. It is also the common name for a member of the genus Planaria within the family Planariidae. Sometimes it also refers to the genus Dugesia.Planaria are common to many parts of the world, living in both saltwater and freshwater ponds and rivers.".
- Planarian label "Planaire".
- Planarian label "Planarian".
- Planarian label "Planarium".
- Planarian label "Планарии".
- Planarian label "مستورقات".
- Planarian label "プラナリア".
- Planarian sameAs Planaire.
- Planarian sameAs Planarium.
- Planarian sameAs プラナリア.
- Planarian sameAs 플라나리아.
- Planarian sameAs m.02bkz4.
- Planarian sameAs Q6502673.
- Planarian sameAs Q6502673.
- Planarian wasDerivedFrom Planarian?oldid=606312359.
- Planarian depiction Polycelis_felina.jpg.
- Planarian isPrimaryTopicOf Planarian.
