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Their body is populated by adult stem cells called neoblasts, which planarians use for regenerating missing body parts. [6] Many species are able to regenerate any missing organ, which has made planarians a popular model in research of regeneration and stem cell biology. [7]
Neoblasts (ˈniːəʊˌblæst) are adult stem cells found in planarian flatworms. They are the only dividing planarian cells, and they produce all cell types, including the germline. [1][2] Neoblasts are abundant in the planarian parenchyma, and comprise up to 30 percent of all cells. [1] Following injury, neoblasts rapidly divide and generate ...
Biological immortality (sometimes referred to as bio-indefinite mortality) is a state in which the rate of mortality from senescence is stable or decreasing, thus decoupling it from chronological age. Various unicellular and multicellular species, including some vertebrates, achieve this state either throughout their existence or after living ...
Regeneration in biology is the process of renewal, restoration, and tissue growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage. [ 1 ] Every species is capable of regeneration, from bacteria to humans. [ 2 ][ 3 ][ 4 ] Regeneration can either be complete [ 5 ...
Epimorphosis. Epimorphosis is defined as the regeneration of a specific part of an organism in a way that involves extensive cell proliferation of somatic stem cells, [1] dedifferentiation, and reformation, [2] as well as blastema formation. [3] Epimorphosis can be considered a simple model for development, though it only occurs in tissues ...
Planaria. For the common name given to many non-parasitic flatworms, see Planarian. Planaria is a genus of planarians in the family Planariidae. Due to its excellent ability to regenerate, species of Planaria has also been used as model organisms in regeneration studies. [1] When an individual is cut into pieces, each piece has the ability to ...
Regenerative medicine. A colony of human embryonic stem cells. Regenerative medicine deals with the "process of replacing, engineering or regenerating human or animal cells, tissues or organs to restore or establish normal function". [1] This field holds the promise of engineering damaged tissues and organs by stimulating the body's own repair ...
Geoplanidae. Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. [ 2] These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive properties of their mucus. [ 3] They lack water-retaining mechanisms and are therefore ...
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