Dictionary » D » Diploblastic




Pertaining to a condition in which there are two primary germ layers, such as ectoderm and endoderm.


Examples of animals that developed from a diploblastic embryo are cnidarians and ctenophores.

Word origin: Greek diplóos, twofold + blastikós, budding.

Related forms: diploblasty (noun).

Compare: triploblastic, monoblastic.
See also: blastula, germ layer.

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Re: Respiration of a polyp (hydra)

Hydra are diploblastic, i.e. they have only two cell layers. Respiration is by simple diffusion.

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by Gavin
Fri Oct 28, 2011 1:19 am
Forum: Zoology Discussion
Topic: Respiration of a polyp (hydra)
Replies: 1
Views: 2411

Evolutionary relationship between mesoderm & mesoglea?

... and Cnidarians have a gel-like, acellular layer separating their ecto and gastrodermis, termed the mesoglea. I know these two phyla are diploblastic, and that acoelomorphs, ecdysozoans, lophotrochozans, and deuterostomes (the bilaterians) are all triploblastic, thus they have three primary ...

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by cherib
Mon Oct 05, 2009 11:15 pm
Forum: Evolution
Topic: Evolutionary relationship between mesoderm & mesoglea?
Replies: 2
Views: 3301

Exchange of Gases, Nutrients and Waste

... What should I do now? Ahh, I will talk about two-layered coelenterates :) It means that their body wall consists of two layers or called as diploblastic , i.e. the endoderm (sometimes referred to as the gastrodermis ) and the ectoderm or the epidermis . Between the two cell layers is the ...

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by Dr.Stein
Tue Jan 17, 2006 3:04 am
Forum: Cell Biology
Topic: Exchange of Gases, Nutrients and Waste
Replies: 3
Views: 3355

Digestive System Evolution

... cavity - in phyllum Porifera - intracelular digestion which realize through epithelium of choanocytes. 2. Digestive duffle - in orgs with diploblastic body plan - Cnidaria, Acnidaria (Coelenterata) - this has only one opening - mouth(thats why duffle), intracelular digestion changes to ...

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by protozoan
Tue Apr 12, 2005 7:36 pm
Forum: Evolution
Topic: Digestive System Evolution
Replies: 60
Views: 120917

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