Definitions related to Classification

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Please define the following terms:

i) Diploblastic

ii) Triploblastic

Thank you in advance!

Oct 6th, 2014

Diploblastic:

1. Body wall develops from two embryonic germ layers- ectoderm and endoderms and persists as such in adult.

2. Non- cellular, gelatinous mesogloea is present in between ectoderm and endoderm.

3. Coelom is absent, e.g. Hydra (coelenterates), sponges (Porifera).

Triploblastic:

1. Body develops from 3 germ layers- ectoderm,mesoderm and endoderms.

2. Mesogloea is absent and mesoderm is present.

3. Coelom is present, e.g. platy-helminthes, annelids, arthropods, mollusks, echinoderms and choradates.


Reference:

http://www.preservearticles.com/201101123139/difference-between-diploblastic-and-triploblastic.html


Oct 6th, 2014

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