Diploblasty
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2008-05-01T00:39:33Z
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'''Diploblasty''' is a condition of the ovum in which there are two primary [[germ layer]]s: the [[ectoderm]] and [[endoderm]].
Diploblastic organisms are organisms which evolve from such an ovum, and include [[cnidaria]] and [[ctenophores]].
The endoderm allows them to develop true [[Biological tissue|tissue]]. This includes tissue associated with the gut and associated glands. The ectoderm on the other hand gives rise to the epidermis, the nervous tissue, and if present, nephridia.
Simpler animals, such as [[sea sponges]], have one germ layer and lack true tissue organisation.
All the more complex animals (from flat worms to man) are [[triploblastic]] with three germ layers (a [[mesoderm]] as well as ectoderm and endoderm). The mesoderm allows them to develop true [[Organ (anatomy)|organs]].
==See also==
*[[Triploblasty]]
{{developmental-biology-stub}}
[[Category:Developmental biology]]
[[ca:Diblàstic]]
[[es:Diblástico]]
[[fr:Diploblastique]]
[[nn:Diploblastiske dyr]]
[[pl:Dwuwarstwowce]]