Planarian | Anatomy & Facts | Britannica
planarian, (class Turbellaria), any of a group of widely distributed, mostly free-living flatworms of the class Turbellaria (phylum Platyhelminthes). Planaria is the name of one genus, but the name planarian is used to designate any member of …
Planarian - Wikipedia
Planarians (triclads) are free-living flatworms of the class Turbellaria, [2][3] order Tricladida, [4] which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. [5] Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. [5]
Planarian – Biology, Classification, Characteristics, and …
What is a planarian? A quick overview. Planaria or Planarians (singular: Planarian) are also called “cross-eyed worms”. They are a group of tiny flatworms belonging to the phylum of Platyhelminthes. They are free-living organisms and widely distributed in …
Planaria - Wikipedia
Currently the genus Planaria is defined as freshwater triclads with oviducts that unite to form a common oviduct without embracing the bursa copulatrix and with an adenodactyl present in the male atrium. The testes occur along the whole body.
Planaria - The Wildlife Trusts
Planaria. Scientific name: Tricladida. Planaria are flatworms in the phylum Platyhelminthes with amazing regeneration abilities giving them the title 'immortal under the edge of a knife'. There are many different species that inhabit freshwater, marine and terrestrial ecosystems.
Planarian - New World Encyclopedia
A planarian is any flatworm (phylum Platyhelminthes) of the suborder (or order) Tricladida of the class Turbellaria. Primarily free-living, planarians are characterized by a soft, broad, leaf -shaped (when elongated) body with cilia and a three-branched digestive tract (as reflected in the name Tricladida).
Planarians | Brain and Cognitive Sciences - Massachusetts …
Planarians are bilaterally symmetric metazoans that possess almost unlimited regenerative capacities and that have been a classic regeneration model for over a century. Planarians have cephalic ganglia (the brain), two ventral nerve cords, and many sensory neurons.
Planarians: Current Biology - Cell Press
2004年9月21日 · What are planarians? As any high school student will tell you, planarians are flat, free-living worms, members of the phylum Platyhelminthes (Platy, flat; helminth, worm) with cross-eyed-looking photoreceptors and a remarkable capacity for regeneration (Figure 1).
Planaria: A window on regeneration - Exploratorium
Planaria are tiny flatworms that live in freshwater and marine environments, and on plants throughout the globe. A single one can be cut into hundreds of pieces and each will grow back into a whole planarian—a remarkable feat.
Planaria are tiny flatworms that live in freshwa-ter and marine environments, and on plants throughout the globe. A single one can be cut into hundreds of pieces and each will grow back into a whole planarian—a remark-able feat. Planaria species S. mediterranea and D. dorotocephla swimming together.