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

Name the system that contains three neurons, Name the system that contains ...

Name the system that contains three neurons Consider a system that contains three neurons in a culture dish bathed in normal physiological saline.  All three neurons are health

What is coronary disease, What is coronary disease? Coronary disease, o...

What is coronary disease? Coronary disease, or coronary insufficiency, is a disease in which there is total or partial obstruction of one or more of the arteries that irrigate

Determine the use of natural colourants, Determine the use of natural colou...

Determine the use of natural colourants The use of natural colourants is limited due to their instability, low tinctorial power or price disadvantage.  The trend towards natura

Types of amoeboid movements, Types of Amoeboid Movements As the amoeba...

Types of Amoeboid Movements As the amoeba's cell body throws out one or a few pseudopodial lobes, a temporary rear end or uroid is pulled along. The central, more fluid protop

Explain about the enteral feeding in elderly, Explain about the Enteral fee...

Explain about the Enteral feeding in elderly? Enteral, as you may already be aware, is defined as provision of nutrition support through the GI tract or by accessing the gut. Th

Direct use values of biodiversity, Q. Direct use values of biodiversity? ...

Q. Direct use values of biodiversity? Direct use values are for those goods that are ensured directly e.g. food and timber. Maintaining a wide range of components of biological

What are organic chemical groups that divide carbohydrates, What are the or...

What are the organic chemical groups that characterize carbohydrates? How are carbohydrates classified according to the presence of those groups? Carbohydrates are also called

Theory of embryology - regulative theory, REGUL A TIV E THEORY It...

REGUL A TIV E THEORY It was propounded by Hens Driesch. He performed experiments on the eggs of sea urchin similar to the experiments performed by Roux. He observed

Explain the catabolic responses, Explain the Catabolic Responses? Hormo...

Explain the Catabolic Responses? Hormonal responses during the hyper inetabolic phase of infection are same as in case of injury. Serum cortisol levels are elevated, glycogen i

Name some drugs to prvent tuberculosis, Name some Drugs to prvent tuberculo...

Name some Drugs to prvent tuberculosis Pyrazinamide can cause morbilliform rash, arthralgias and asymptomatic hyperuricemia, and blocks the hypouricemic action of allopurinol (

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