Editing Diploblasty

{{short description|State of having two germ layers in embryonic development}}
{{redirect|Diploblast|the proposed basal animal clade|Eumetazoa}}
'''Diploblasty''' is a condition of the [[blastula]] in which there are two primary [[germ layer]]s: the [[ectoderm]] and [[endoderm]].<ref>{{Cite journal |last1=Seipel |first1=Katja |last2=Schmid |first2=Volker |date=2005-06-01 |title=Evolution of striated muscle: Jellyfish and the origin of triploblasty |journal=Developmental Biology |language=en |volume=282 |issue=1 |pages=14–26 |doi=10.1016/j.ydbio.2005.03.032 |pmid=15936326 |issn=0012-1606|doi-access=free }}</ref>

Diploblastic organisms are organisms which develop from such a blastula, and include [[Cnidaria]] and [[Ctenophora]], formerly grouped together in the phylum Coelenterata, but later understanding of their differences resulted in their being placed in separate phyla.

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 organization.

All the more complex animals (from flat worms to humans) are [[triploblastic]] with three germ layers (a [[mesoderm]] as well as ectoderm and endoderm). The mesoderm allows them to develop true [[Organ (anatomy)|organs]].

Groups of diploblastic animals alive today include jellyfish, corals, sea anemones and comb jellies.

==See also==
*[[Triploblasty]]

[[Category:Developmental biology]]

== References ==
{{Reflist}}{{Developmental-biology-stub}}