Enterocoelous pattern – coelom, Biology

Assignment Help:

Enterocoelous pattern – Coelom

In enterocoelous development of coelom the mesoderm arises in the embryo as paired lateral pouches growing out from the archenteron. The pouches grow 'and later get disconnected from the archenteron. The cavity of the pouch becomes the coelom. The inner wall of the pouch surrounds the developing alimentary canal and the outer layer lines the developing body wall. Those two layers become the future mesoderm. The animals possessing such cavities are known as enterocoelomates. Echinoderms hemichordates and chordates show this pattern of coelom development. The two different patterns of origin of coelom are another expression of the protostome - deuterostome dichotomy in evolution. Protostomes typically show schizocoelous origin of coelom while in deuterostome the coelom arises usually by enterocoely.

2248_Enterocoelous pattern – Coelom.png
Figure: Enterocoelous origin

The coelom provides the coelomic animals with a tube-within a tube body plan that allows greater flexibility when compared to animals that do not have internal body cavity. The fluid filled coelom additionally serves as a hydrostatic skeleton, in some forms such as worms, aiding in burrowing and inmovement. The coelom is of great significance in animal evolution. It is a stepping stone for evolution of more complex and larger forms.


Related Discussions:- Enterocoelous pattern – coelom

What happens to the parent cell, What is produced at the end of the cell cy...

What is produced at the end of the cell cycle? how do they compare to each other and to the parent cell? What happens to the parent cell?

What is inertization, Q. What is Inertization? The process of "inertiza...

Q. What is Inertization? The process of "inertization" involves mixing waste with cement and other substances before disposal in order to minimize the risk of toxic substance c

What causes acid precipitation, What causes acid precipitation? Acid pr...

What causes acid precipitation? Acid precipitation is the result of air pollutants that combine with water vapor in the atmosphereto form acids, causing precipitation that is m

How to reduce the toxicity of a chemical in the body, Which process may not...

Which process may not reduce the toxicity of a chemical in the body?

Influence of associated ions, Influence of Associated Ions The second i...

Influence of Associated Ions The second important factor influencing the plant uptake of a given cation is the effects of the ions held in association with it. For instance, as

Hemophilic man (xhy) and nonhemophilic noncarrier (xx), Is it possible for ...

Is it possible for any son of a couple formed by a hemophilic man (XhY) and a nonhemophilic noncarrier (XX) woman to be hemophilic? If the mothers are not affected by the disea

Explain the indirect methods of microbial estimation, Explain the Indirect ...

Explain the Indirect Methods of Microbial Estimation? Indirect methods, i.e., methods other than those counting the microbial cells can also be used for quantitation purpose. T

Determine the prevention of cholera, Determine the prevention of Cholera ...

Determine the prevention of Cholera Prevention:  Following recommendations are  there to prevent cholera  outbreak: Drink only water that you have boiled or treated with

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd