Enterocoelous pattern – coelom, Biology

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.

Posted Date: 1/15/2013 2:25:21 AM | Location : United States







Related Discussions:- Enterocoelous pattern – coelom, Assignment Help, Ask Question on Enterocoelous pattern – coelom, Get Answer, Expert's Help, Enterocoelous pattern – coelom Discussions

Write discussion on Enterocoelous pattern – coelom
Your posts are moderated
Related Questions
Determine Some Guidelines for Cancer Prevention? The guidelines for cancer prevention focus on the following: 1. Include plant-based diet, limiting red meat in particular.

Point mutations are often caused by substances called mutagens explain? Point mutations are often caused by substances called mutagens. Base analogs, such as 5-bromouracil, a t

ORIGIN (1) From Pro plastid (2) Division (3) Endosymbiotic origin from a cyanobacterium

Define the Feeding and Nutritional Management of spinal trauma? The main objectives of nutritional management are to meet the nutritional needs of the initial acute phase and

Q. Where in the body is the thyroid gland located? The thyroid is located in the anterior cervical region (frontal neck) in just below the larynx and front of the trachea and i

What is Phylum Porifera in Classification of the Animal King? Sponges are the simplest form of animals. Their bodies are not organized in any specific pattern other than masses

Fate Map - Gastrulation in Chick All the three main germinal layers (ectoderm, mesoderm, endoderm) are made from cells initially located in the epiblast in area pellucida, hen

Together, genomics, proteomics and transcriptomics are influential approaches to enhancing our understanding not only of how cells function normally but also what the key modificat

Q. What is the function of the myelin sheath? Do all axons present a myelin sheath? The function of the myelin sheath is to improve the speed and safety of the neural impulse t

A 37-year old woman is admitted to the hospital after complaining of chest pains. She admits to having had severe headaches for several days prior to seeking medical help. She is a