Triploblasty

Triploblasty

Triploblasty is a condition of the blastula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm. Additionally, the term may refer to any ovum in which the blastoderm splits into three layers. All higher and intermediate animals (from flat worms to humans), arise from a triploblastic ovum. Triploblastic organisms are organisms which evolve from such an ovum. Generally speaking, triploblastic organisms belong to the Bilateria subregnum.Compare to simpler diploblastic animals such as cnidaria with two germ layers and even simpler animals such as sponges with only one germ layer.


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  • triploblasty — noun A condition of the blastula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm. See Also: triploblastic …   Wiktionary

  • Cnidaria — Temporal range: 580–0 Ma …   Wikipedia

  • Diploblasty — is a condition of the blastula in which there are two primary germ layers: the ectoderm and endoderm. Diploblastic organisms are organisms which develop from such a blastula, and include cnidaria and ctenophora, formerly grouped together in the… …   Wikipedia

  • Кишечнополостные — ? Кишечнополостные …   Википедия

  • Стрекающие — Одиночный коралловый полип Ceriantharia …   Википедия

  • Радиальные — ? Кишечнополостные Гребневик из рода Bolinopsis …   Википедия

  • triploblastic — adjective Exhibiting triploblasty …   Wiktionary

  • Ctenophora — For the genus of crane flies, see Ctenophora (genus). Comb jellies Temporal range: Cambrian – Recent …   Wikipedia

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