Triploblasty
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198086835
2008-03-14T00:23:33Z
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'''Triploblasty''' is a condition of the [[blastula]] in which there are three primary [[germ layer]]s: 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 [[diploblasty|diploblastic]] animals such as [[cnidaria]] with two germ layers and even simpler animals such as [[sea sponge|sponges]] with only one germ layer.
{{developmental-biology-stub}}
[[Category:Developmental biology]]
[[ca:Triploblàstia]]
[[es:Triblásticos]]
[[fr:Triploblastique]]
[[it:Triploblastico]]
[[pl:Trójwarstwowce]]
[[pt:Triblástico]]