Gastrulation in chick, Biology

Assignment Help:

Gastrulation in Chick

Cleavage in the fertilized egg occurs during its passage through the oviduct to cloaca of the hen. By the time it is laid meroblastic cleavage has resulting in the creation of a various layered W-like blastoderm in which two distinct regions can be accepted:

  1. The clear central circular area pellucida separated from the fundamental yolk through a space called the sub-germinal space or cavity and
  2. The peripheral area opaca wherein the cells of the lower layer are in intimate contact along with the yolk making this region dark and opaque.

The inner border of area opaca directly adjoining the area pellucida is the marginal zone and its remaining peripheral part is termed as the germ wall. A thickened region of marginal zone because of great density of cells indicates the future posterior side of the embryo. In chick, gastrulation is a prolonged process. It is started soon after the beginning of incubation after laying of the egg and is completed in about 4 days. The actual process of gastrulation is preceded through some pre-gastrula movements of certain cells resultant in their separation from the blastoderm and formation of a lower layer called the hypoblast. Though, Most of the cells remain in the upper layers of the blastoderm which now constitute the epiblast.


Related Discussions:- Gastrulation in chick

Explain ketogenic diet, Explan Ketogenic diet Ketogenic diet:   It is ...

Explan Ketogenic diet Ketogenic diet:   It is occasionally used to facilitate the control of epilepsy. Here, the patient  is  initially  fasted  for  48 hours and thereafter,

Management of gout, Q. Management of Gout? The goals of therapy or mana...

Q. Management of Gout? The goals of therapy or management of gout is based on the following aspects: • early resolution of inflammation, • prevention of recurrent attac

Coa to succinate in the citric acid cycle, Name the high-energy complex gen...

Name the high-energy complex generated during the conversion of succinyl CoA to succinate in the citric acid cycle GTP  or  ATP is  the high-energy  complex generated during th

Types of leaves, Types of leaves Collect leaves from such plants as lil...

Types of leaves Collect leaves from such plants as lilies, bamboo, corn, willow and geraniums. View that the monocots (lily, bamboo, corn, sugar cane) have the veins running pa

Determine the principle of neuropsychological assessment, Determine the Pri...

Determine the Principle of neuropsychological assessment The neuropsychological assessment of school age of children and adolescents is not primarily a technological enterpris

What is gastrulation, What is gastrulation? How during gastrulation are the...

What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers? Gastrulation is the process by which a portion of the blastula w

Anticoagulation, In patients with left ventricular failure and reduced ejec...

In patients with left ventricular failure and reduced ejection fractions, the risk of LV thrombus formation and systemic arterial embolization appears to be primarily in patients

Development of endosperm, Development of Endosperm In a fertilized emb...

Development of Endosperm In a fertilized embryo sac, the primary endosperm nucleus is generally observed below the zygote. It divides, and further divisions of its products gi

Explain tools of satellite dna, Satellite DNA is useful tool in: 1. Org...

Satellite DNA is useful tool in: 1. Organ transplantation 2. Sex determination 3. Forensic science 4. Genetic engineering Forensic science

Define features of male and female ascaris lumbricoides, Define Features of...

Define Features of male and female ascaris lumbricoides? i)  Ascaris  lumbricoides is  commonly called  round worm. ii)  Body  is elongated, cylindrical,  tapering at  bot

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