About: Cellularization

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The theory of cellularization, also known as the syncytial theory or ciliate-acoel theory, is a theory to explain the origin of Metazoa. The idea was proposed by Hadži (1953) and Hanson (1977). The cellularization theory states that metazoans evolved from a unicellular ciliate with multiple nuclei that went through cellularization. Firstly, the ciliate developed a ventral mouth for feeding and all nuclei moved to one side of the cell. Secondly, an epithelium was created by membranes forming barriers between the nuclei. In this way, a multicellular organism was created from one multinucleate cell (syncytium).

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  • The theory of cellularization, also known as the syncytial theory or ciliate-acoel theory, is a theory to explain the origin of Metazoa. The idea was proposed by Hadži (1953) and Hanson (1977). The cellularization theory states that metazoans evolved from a unicellular ciliate with multiple nuclei that went through cellularization. Firstly, the ciliate developed a ventral mouth for feeding and all nuclei moved to one side of the cell. Secondly, an epithelium was created by membranes forming barriers between the nuclei. In this way, a multicellular organism was created from one multinucleate cell (syncytium). (en)
  • 繊毛虫類起源説 (ciliate theory) とは、動物の系統に関する説のひとつで、繊毛虫が多細胞化したのが多細胞動物の祖先となったとするものである。特にヨヴァン・ハッジによって唱えられたものが有名であり、本項ではこれについて説明する。 (ja)
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  • The theory of cellularization, also known as the syncytial theory or ciliate-acoel theory, is a theory to explain the origin of Metazoa. The idea was proposed by Hadži (1953) and Hanson (1977). The cellularization theory states that metazoans evolved from a unicellular ciliate with multiple nuclei that went through cellularization. Firstly, the ciliate developed a ventral mouth for feeding and all nuclei moved to one side of the cell. Secondly, an epithelium was created by membranes forming barriers between the nuclei. In this way, a multicellular organism was created from one multinucleate cell (syncytium). (en)
  • 繊毛虫類起源説 (ciliate theory) とは、動物の系統に関する説のひとつで、繊毛虫が多細胞化したのが多細胞動物の祖先となったとするものである。特にヨヴァン・ハッジによって唱えられたものが有名であり、本項ではこれについて説明する。 (ja)
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  • Cellularization (en)
  • 繊毛虫類起源説 (ja)
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